diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29a4daf39..902c31222 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,34 @@
 
 ## [Unreleased]
 
+## [1.32.35] — 2026-07-25
+
+The doctor report stops asking for your practice name every time.
+
+You type a clinic or practice name onto the cover of a health record export,
+and until now that was all it did. The field emptied itself again the moment
+you left the panel, so next month's report started from a blank line. The name
+you used last time is now kept and filled in for you. Clearing the line works
+the same way and is remembered too, so a cover without a practice line stays
+without one. The name is saved only once the report has actually been
+produced, which means an export that fails partway leaves the previous value
+alone.
+
+A backup now carries the origin of your daily totals. Steps, distance and
+similar figures that arrive from Apple Health as one number per day are stored
+with a note of where that number came from, so a rough estimate read out of an
+archive can never overwrite a total the phone measured itself. That note was
+missing from the backup file, so a restore brought the figures back without it
+and the protection went quiet. It rides the backup now. Restoring an older
+backup written before this fix marks the affected daily totals as unclassified
+instead of leaving them ambiguous, which is the state a later sync knows how
+to repair.
+
+Migration 0272 drops two columns that were written and never read. They held a
+contributor count and a source fingerprint for archive derived daily totals,
+and no screen, export or repair path has ever looked at either. The figures
+themselves and the origin note above are untouched.
+
 ## [1.32.34] — 2026-07-25
 
 Housekeeping on the interface. Most of it you will not see.
diff --git a/docs/api/openapi.yaml b/docs/api/openapi.yaml
index 289e03009..e9884298b 100644
--- a/docs/api/openapi.yaml
+++ b/docs/api/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.32.34
+  version: 1.32.35
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.
 
diff --git a/package.json b/package.json
index e73c58a5f..997bd607c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "healthlog",
-  "version": "1.32.34",
+  "version": "1.32.35",
   "description": "Self-hosted personal-health-tracking PWA with Withings integration, AI insights, and doctor-report PDF export.",
   "license": "PolyForm-Noncommercial-1.0.0",
   "homepage": "https://healthlog.dev",
diff --git a/prisma/migrations/0272_drop_write_only_aggregation_columns/migration.sql b/prisma/migrations/0272_drop_write_only_aggregation_columns/migration.sql
new file mode 100644
index 000000000..2f81a3122
--- /dev/null
+++ b/prisma/migrations/0272_drop_write_only_aggregation_columns/migration.sql
@@ -0,0 +1,36 @@
+-- v1.32.35 — drop the two write-only aggregation columns on `measurements`.
+--
+-- Migration 0263 added three columns alongside the Apple Health `stats:*`
+-- authority ladder. Only one of them was ever read back:
+--
+--   * `aggregation_provenance` is load-bearing and STAYS. The external
+--     measurement reconciler selects it and refuses a lower-authority write
+--     against a higher-authority canonical row, which is what keeps an
+--     export.xml source-day estimate from clobbering a native HealthKit
+--     statistic. The cumulative drain reads it too.
+--   * `aggregation_contributor_count` and `aggregation_selected_source_hash`
+--     are written and never read. Three call sites write them (the batch
+--     ingest and the cumulative drain write explicit NULLs, the export.xml
+--     import writes real values); nothing selects them, no raw SQL names
+--     them, they reach no export, no backup, no API contract and no repair
+--     path. Verified by a repo-wide search over every tracked file for both
+--     the Prisma field names and the column names.
+--
+-- The import-time selection algorithm keeps its deterministic tiebreak: the
+-- source hash it compares is an in-memory map key computed per flush, not a
+-- value read back from this table. Only the persisted copies go.
+--
+-- DATA BOUNDARY — read before editing.
+--
+-- Both columns are plain nullable scalars added by 0263 with no index, no
+-- unique, no check and no foreign key, so `DROP COLUMN` rewrites the tuples of
+-- `measurements` and stops there. `DROP COLUMN` never cascades into another
+-- table on its own, and there is no CASCADE keyword here. No measured value,
+-- timestamp, unit, note or identity field is touched, and the documented
+-- LEGACY_UNKNOWN repair path operates on `aggregation_provenance`, which
+-- survives. In Postgres this is a catalog-only operation, so it is cheap even
+-- on the largest table in the schema.
+
+ALTER TABLE "measurements"
+  DROP COLUMN IF EXISTS "aggregation_contributor_count",
+  DROP COLUMN IF EXISTS "aggregation_selected_source_hash";
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 2a4920eca..e2d69c31f 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -1636,13 +1636,7 @@ model Measurement {
   // source-day estimate derived from export.xml; migrated ambiguous rows are
   // explicitly LEGACY_UNKNOWN until a native sync or archive reprocess repairs
   // them.
-  aggregationProvenance         MeasurementAggregationProvenance? @map("aggregation_provenance")
-  // Distinct source identities contributing to an export.xml source-day
-  // estimate. Source labels themselves are never persisted.
-  aggregationContributorCount   Int?                             @map("aggregation_contributor_count")
-  // SHA-256 of the deterministically selected source identity. Non-identifying
-  // provenance for repeatability without retaining device/source labels.
-  aggregationSelectedSourceHash String?                          @map("aggregation_selected_source_hash")
+  aggregationProvenance MeasurementAggregationProvenance? @map("aggregation_provenance")
   // Only set for BLOOD_GLUCOSE measurements. NULL for all others.
   glucoseContext        GlucoseContext?       @map("glucose_context")
   // v1.4.23 — per-stage sleep label. NULL for non-sleep rows; non-NULL
diff --git a/public/sw.js b/public/sw.js
index c42b23c88..8978d4ac0 100644
--- a/public/sw.js
+++ b/public/sw.js
@@ -36,7 +36,7 @@ try {
 // v1.4.38.4 → v1.4.42. Do not hand-edit; bump `package.json` and rebuild.
 const CACHE_VERSION =
   (typeof self !== "undefined" && self.__APP_VERSION__) ||
-  /* @sw-version-fallback */ "v1.32.34";
+  /* @sw-version-fallback */ "v1.32.35";
 const STATIC_CACHE = `healthlog-static-${CACHE_VERSION}`;
 const PAGE_CACHE = `healthlog-pages-${CACHE_VERSION}`;
 // v1.18.6 — read-only data cache for a curated allowlist of safe GET `/api/*`
diff --git a/src/app/api/admin/backups/[id]/restore/route.ts b/src/app/api/admin/backups/[id]/restore/route.ts
index d417d0568..879a0a42e 100644
--- a/src/app/api/admin/backups/[id]/restore/route.ts
+++ b/src/app/api/admin/backups/[id]/restore/route.ts
@@ -407,6 +407,25 @@ const handler = apiHandler(
                 : decodeEncryptedBytes(measurement.notesEncrypted),
             externalId: measurement.externalId ?? null,
             externalSourceVersion: measurement.externalSourceVersion ?? null,
+            // Authority of an Apple Health `stats:` aggregate. A backup
+            // written before this field rode the payload carries nothing, and
+            // restoring NULL would flatten the authority ladder: an export.xml
+            // source-day estimate could then overwrite a native HealthKit
+            // statistic, which is the ambiguity migration 0263 already
+            // repaired once. Such a row is exactly the case LEGACY_UNKNOWN
+            // exists for, so it comes back repairable instead of ambiguous.
+            //
+            // The gate is scoped exactly as 0263 scoped its backfill and as
+            // the cumulative drain scopes its own LEGACY_UNKNOWN writes:
+            // Apple Health rows only. Other providers mint `stats:` ids for
+            // their cumulative dailies too (Fitbit, Google Health) and have
+            // never carried provenance — marking those would invent a state
+            // they were never in. Ordinary point rows keep NULL honestly.
+            aggregationProvenance: (measurement.aggregationProvenance ??
+              (measurement.source === "APPLE_HEALTH" &&
+              measurement.externalId?.startsWith("stats:")
+                ? "LEGACY_UNKNOWN"
+                : null)) as never,
             glucoseContext: (measurement.glucoseContext ?? null) as never,
             sleepStage: (measurement.sleepStage ?? null) as never,
             rhythmClassification: (measurement.rhythmClassification ??
diff --git a/src/app/api/export/health-record/__tests__/route.test.ts b/src/app/api/export/health-record/__tests__/route.test.ts
index 08ad8e15b..2edf0ab3c 100644
--- a/src/app/api/export/health-record/__tests__/route.test.ts
+++ b/src/app/api/export/health-record/__tests__/route.test.ts
@@ -249,3 +249,76 @@ describe("POST /api/export/health-record — outputs", () => {
     );
   });
 });
+
+/**
+ * The practice name is a remembered preference (`User.lastReportPracticeName`),
+ * so a monthly report does not ask for the clinic name again every time. The
+ * write happens only once the artefact exists — a generation that throws must
+ * not overwrite the remembered value with a half-typed one.
+ *
+ * Mutation check: drop the `rememberPracticeName` call in the route and the
+ * first two cases go red; move it above the generation and the
+ * failed-generation case goes red.
+ */
+describe("POST /api/export/health-record — remembered practice name", () => {
+  it("persists the sanitised practice name after a PDF export", async () => {
+    const { POST } = await import("../route");
+    const res = await POST(
+      mkReq({ format: "pdf", practiceName: "  Sample   Practice  " }),
+    );
+    expect(res.status).toBe(200);
+    expect(prisma.user.update).toHaveBeenCalledWith({
+      where: { id: "user-1" },
+      data: { lastReportPracticeName: "Sample Practice" },
+    });
+  });
+
+  it("persists the practice name after a FHIR export", async () => {
+    const { POST } = await import("../route");
+    const res = await POST(
+      mkReq({ format: "fhir", practiceName: "Sample Practice" }),
+    );
+    expect(res.status).toBe(200);
+    expect(prisma.user.update).toHaveBeenCalledWith({
+      where: { id: "user-1" },
+      data: { lastReportPracticeName: "Sample Practice" },
+    });
+  });
+
+  it("persists null when the user cleared the practice name", async () => {
+    const { POST } = await import("../route");
+    const res = await POST(mkReq({ format: "pdf" }));
+    expect(res.status).toBe(200);
+    expect(prisma.user.update).toHaveBeenCalledWith({
+      where: { id: "user-1" },
+      data: { lastReportPracticeName: null },
+    });
+  });
+
+  it("writes nothing when the selection is rejected", async () => {
+    const { POST } = await import("../route");
+    const res = await POST(mkReq({ format: "xml", practiceName: "Sample" }));
+    expect(res.status).toBe(422);
+    expect(prisma.user.update).not.toHaveBeenCalled();
+  });
+
+  it("writes nothing when the generation fails", async () => {
+    vi.mocked(prisma.measurement.findMany).mockRejectedValue(
+      new Error("read failed"),
+    );
+    const { POST } = await import("../route");
+    const res = await POST(
+      mkReq({ format: "pdf", practiceName: "Sample Practice" }),
+    );
+    expect(res.status).toBe(500);
+    expect(prisma.user.update).not.toHaveBeenCalled();
+  });
+
+  it("narrows the update to the session user, never the body", async () => {
+    const { POST } = await import("../route");
+    await POST(mkReq({ format: "fhir", practiceName: "Sample Practice" }));
+    expect(prisma.user.update).toHaveBeenCalledWith(
+      expect.objectContaining({ where: { id: "user-1" } }),
+    );
+  });
+});
diff --git a/src/app/api/export/health-record/route.ts b/src/app/api/export/health-record/route.ts
index 83253d1ff..adde3d743 100644
--- a/src/app/api/export/health-record/route.ts
+++ b/src/app/api/export/health-record/route.ts
@@ -54,6 +54,28 @@ import { parseLocaleFromAcceptLanguage } from "@/lib/format-locale";
 import { locales, type Locale } from "@/lib/i18n/config";
 import { resolveUserTimezone } from "@/lib/tz/resolver";
 
+/**
+ * Remember the practice / clinic name for the next report, so the user does
+ * not retype it every time (`User.lastReportPracticeName`, the preference the
+ * doctor-report contract has always promised).
+ *
+ * Called only once the requested artefact has actually been produced: a
+ * generation that throws must not overwrite the remembered name with a
+ * half-typed one. `null` is a legitimate value — the user cleared the line and
+ * the next cover should stay cleared. The value is the already-sanitised one
+ * (`sanitisePracticeName`, 120-char cap), and the update names its single
+ * field explicitly rather than spreading the parsed selection.
+ */
+async function rememberPracticeName(
+  userId: string,
+  practiceName: string | null,
+) {
+  await prisma.user.update({
+    where: { id: userId },
+    data: { lastReportPracticeName: practiceName },
+  });
+}
+
 export const POST = apiHandler(async (request: NextRequest) => {
   const { user } = await requireAuth();
   annotate({ action: { name: "export.health-record.build" } });
@@ -189,6 +211,7 @@ export const POST = apiHandler(async (request: NextRequest) => {
       fhirRecords,
     );
     const json = JSON.stringify(bundle);
+    await rememberPracticeName(user.id, practiceName);
     annotate({
       meta: { format: "fhir", bytes: json.length, days: range.days },
     });
@@ -212,6 +235,9 @@ export const POST = apiHandler(async (request: NextRequest) => {
     includeCharts,
     aiSummary,
   });
+  // Both remaining formats (`pdf`, `package`) carry the rendered PDF, so the
+  // artefact exists from here on.
+  await rememberPracticeName(user.id, practiceName);
 
   if (selection.format === "pdf") {
     annotate({
diff --git a/src/app/api/measurements/batch/route.ts b/src/app/api/measurements/batch/route.ts
index 1fe4aee66..8aa5ec5db 100644
--- a/src/app/api/measurements/batch/route.ts
+++ b/src/app/api/measurements/batch/route.ts
@@ -544,8 +544,6 @@ async function postBatch(request: NextRequest): Promise<Response> {
               .rhythmClassification as Prisma.MeasurementUncheckedCreateInput["rhythmClassification"],
             deviceType: p.row.deviceType as string | null,
             aggregationProvenance: statsRow ? "HEALTHKIT_STATISTICS" : null,
-            aggregationContributorCount: null,
-            aggregationSelectedSourceHash: null,
           },
           { exactExternalMatch: statsRow ? "update" : "duplicate" },
         ),
diff --git a/src/components/settings/__tests__/disable-coach-card.test.tsx b/src/components/settings/__tests__/disable-coach-card.test.tsx
index 945933485..b6b326e09 100644
--- a/src/components/settings/__tests__/disable-coach-card.test.tsx
+++ b/src/components/settings/__tests__/disable-coach-card.test.tsx
@@ -74,6 +74,7 @@ function buildUser(disableCoach: boolean): AuthUser {
     insurerName: null,
     insurerIkNumber: null,
     insuranceNumber: null,
+    lastReportPracticeName: null,
     cycleTrackingEnabled: false,
     modules: {},
   };
diff --git a/src/components/settings/__tests__/health-record-export-practice-name.test.tsx b/src/components/settings/__tests__/health-record-export-practice-name.test.tsx
new file mode 100644
index 000000000..24c5c298e
--- /dev/null
+++ b/src/components/settings/__tests__/health-record-export-practice-name.test.tsx
@@ -0,0 +1,97 @@
+/**
+ * Settings → Gesundheitsakte: the practice name is remembered between reports.
+ *
+ * `User.lastReportPracticeName` is persisted by the export route after a
+ * successful generation and rides the `/api/auth/me` payload. This suite pins
+ * the read half: the panel opens pre-filled with the last-used name instead of
+ * asking for the clinic name again on every report.
+ *
+ * SSR-only, per the project convention for this surface (node environment,
+ * no `@testing-library/react`). The seed runs during render — a `useState`
+ * initializer would read `undefined` while `useAuth` is still resolving and
+ * stick at empty — so the static markup already carries the seeded value.
+ *
+ * Mutation check: revert the seeding block in the panel and the first case
+ * goes red.
+ */
+import { describe, expect, it, vi } from "vitest";
+import { renderToStaticMarkup } from "react-dom/server";
+
+import type { AuthUser } from "@/hooks/use-auth";
+
+const authSpy = vi.fn<() => { user: AuthUser | null }>();
+vi.mock("@/hooks/use-auth", async () => {
+  const actual =
+    await vi.importActual<typeof import("@/hooks/use-auth")>(
+      "@/hooks/use-auth",
+    );
+  return { ...actual, useAuth: () => authSpy() };
+});
+
+vi.mock("@tanstack/react-query", () => ({
+  useQueryClient: () => ({ invalidateQueries: vi.fn() }),
+}));
+
+import { I18nProvider } from "@/lib/i18n/context";
+import { HealthRecordExportPanel } from "../health-record-export-panel";
+
+function buildUser(lastReportPracticeName: string | null): AuthUser {
+  return {
+    id: "user-1",
+    username: "user",
+    email: null,
+    role: "USER",
+    heightCm: null,
+    dateOfBirth: null,
+    gender: null,
+    timezone: "Europe/Berlin",
+    onboardingCompletedAt: null,
+    onboardingTourCompleted: true,
+    onboardingTourProgress: null,
+    avatarUrl: null,
+    glucoseUnit: null,
+    unitPreference: "metric",
+    timeFormat: "AUTO",
+    dateFormat: "AUTO",
+    disableCoach: false,
+    fullName: null,
+    insurerName: null,
+    insurerIkNumber: null,
+    insuranceNumber: null,
+    lastReportPracticeName,
+    cycleTrackingEnabled: false,
+    modules: {},
+  } as AuthUser;
+}
+
+function renderPanel(user: AuthUser | null): string {
+  authSpy.mockReturnValue({ user });
+  return renderToStaticMarkup(
+    <I18nProvider initialLocale="en">
+      <HealthRecordExportPanel />
+    </I18nProvider>,
+  );
+}
+
+function practiceInputValue(html: string): string | null {
+  const input = html.match(/<input[^>]*id="hr-practice"[^>]*>/)?.[0];
+  if (!input) return null;
+  return input.match(/value="([^"]*)"/)?.[1] ?? "";
+}
+
+describe("<HealthRecordExportPanel> — remembered practice name", () => {
+  it("pre-fills the input with the last-used practice name", () => {
+    const html = renderPanel(buildUser("Sample Practice"));
+    expect(practiceInputValue(html)).toBe("Sample Practice");
+  });
+
+  it("leaves the input empty when no name was ever remembered", () => {
+    const html = renderPanel(buildUser(null));
+    expect(practiceInputValue(html)).toBe("");
+  });
+
+  it("leaves the input empty while the auth payload is still resolving", () => {
+    const html = renderPanel(null);
+    expect(practiceInputValue(html)).toBe("");
+  });
+});
diff --git a/src/components/settings/__tests__/modules-section.test.tsx b/src/components/settings/__tests__/modules-section.test.tsx
index 88c93e4d1..a77475675 100644
--- a/src/components/settings/__tests__/modules-section.test.tsx
+++ b/src/components/settings/__tests__/modules-section.test.tsx
@@ -107,6 +107,7 @@ function buildUser(
     insurerName: null,
     insurerIkNumber: null,
     insuranceNumber: null,
+    lastReportPracticeName: null,
     cycleTrackingEnabled: false,
     modules,
     moduleAvailability: {},
diff --git a/src/components/settings/__tests__/time-format-select.test.tsx b/src/components/settings/__tests__/time-format-select.test.tsx
index cea538c04..27c89a7c8 100644
--- a/src/components/settings/__tests__/time-format-select.test.tsx
+++ b/src/components/settings/__tests__/time-format-select.test.tsx
@@ -52,6 +52,7 @@ function buildUser(timeFormat: TimeFormatPreference): AuthUser {
     insurerName: null,
     insurerIkNumber: null,
     insuranceNumber: null,
+    lastReportPracticeName: null,
     cycleTrackingEnabled: false,
     modules: {},
   };
diff --git a/src/components/settings/__tests__/unit-preference-select.test.tsx b/src/components/settings/__tests__/unit-preference-select.test.tsx
index e944c2ddc..9fc1945dd 100644
--- a/src/components/settings/__tests__/unit-preference-select.test.tsx
+++ b/src/components/settings/__tests__/unit-preference-select.test.tsx
@@ -55,6 +55,7 @@ function buildUser(unitPreference: "metric" | "imperial"): AuthUser {
     insurerName: null,
     insurerIkNumber: null,
     insuranceNumber: null,
+    lastReportPracticeName: null,
     cycleTrackingEnabled: false,
     modules: {},
   };
diff --git a/src/components/settings/health-record-export-panel.tsx b/src/components/settings/health-record-export-panel.tsx
index 385efb790..70bc7d956 100644
--- a/src/components/settings/health-record-export-panel.tsx
+++ b/src/components/settings/health-record-export-panel.tsx
@@ -22,6 +22,7 @@
 
 import Link from "next/link";
 import { useId, useState } from "react";
+import { useQueryClient } from "@tanstack/react-query";
 import {
   ChevronDown,
   Download,
@@ -41,6 +42,7 @@ import { useRovingRadioGroup } from "@/hooks/use-roving-radio-group";
 import { apiFetchRaw } from "@/lib/api/api-fetch";
 import { useAuth } from "@/hooks/use-auth";
 import { useTranslations } from "@/lib/i18n/context";
+import { queryKeys } from "@/lib/query-keys";
 import { cn } from "@/lib/utils";
 
 type ExportFormat = "pdf" | "fhir" | "package";
@@ -126,9 +128,13 @@ function buildSelectionSections(s: SectionState) {
 export function HealthRecordExportPanel() {
   const { t, locale } = useTranslations();
   const { user } = useAuth();
+  const queryClient = useQueryClient();
   const [format, setFormat] = useState<ExportFormat>("pdf");
   const [days, setDays] = useState<number>(90);
   const [practiceName, setPracticeName] = useState("");
+  const [practiceNameSeededUserId, setPracticeNameSeededUserId] = useState<
+    string | null
+  >(null);
   const [includeCharts, setIncludeCharts] = useState(true);
   const [includeAiSummary, setIncludeAiSummary] = useState(false);
   const [sections, setSections] = useState<SectionState>(DEFAULT_SECTIONS);
@@ -139,6 +145,17 @@ export function HealthRecordExportPanel() {
   const [includedDataOpen, setIncludedDataOpen] = useState(false);
   const includedDataPanelId = useId();
 
+  // Seed the practice name from the last export once the auth payload lands.
+  // `useAuth` resolves asynchronously, so a `useState` initializer would read
+  // `undefined` and stick at empty. Store-the-id-alongside-the-state (the same
+  // pattern the account form uses) syncs during render instead of in an
+  // effect, and the per-user gate means a late re-resolve never clobbers a
+  // field the user is already typing into.
+  if (user && user.id !== practiceNameSeededUserId) {
+    setPracticeNameSeededUserId(user.id);
+    setPracticeName(user.lastReportPracticeName ?? "");
+  }
+
   const isPdfLike = format === "pdf" || format === "package";
   const isFhirLike = format === "fhir" || format === "package";
 
@@ -199,6 +216,10 @@ export function HealthRecordExportPanel() {
       a.click();
       a.remove();
       URL.revokeObjectURL(url);
+      // The route just persisted the practice name, so the cached `/me`
+      // payload is stale. Refresh it, or a remount of this panel would seed
+      // from the previous value.
+      void queryClient.invalidateQueries({ queryKey: queryKeys.authMe() });
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
     } finally {
diff --git a/src/hooks/use-auth.ts b/src/hooks/use-auth.ts
index 537ed1dac..af8208231 100644
--- a/src/hooks/use-auth.ts
+++ b/src/hooks/use-auth.ts
@@ -116,6 +116,13 @@ export interface AuthUser {
    */
   insurerIkNumber: string | null;
   insuranceNumber: string | null;
+  /**
+   * Practice / clinic name from the last health-record export, so the export
+   * panel opens pre-filled instead of asking for it again every month. The
+   * export route persists it after a successful generation; `null` means the
+   * user has never set one, or deliberately cleared the line.
+   */
+  lastReportPracticeName: string | null;
   /**
    * v1.15.0 — cycle-tracking feature gate, resolved server-side from gender
    * + the per-user opt-in. The cycle nav entry + page hide when false; every
diff --git a/src/lib/export/__tests__/full-backup-payload.test.ts b/src/lib/export/__tests__/full-backup-payload.test.ts
index 82170b68e..aac92b01f 100644
--- a/src/lib/export/__tests__/full-backup-payload.test.ts
+++ b/src/lib/export/__tests__/full-backup-payload.test.ts
@@ -204,6 +204,7 @@ function installSectionMocks() {
     notesEncrypted: measurementNote,
     externalId: "oura-stage-deep",
     externalSourceVersion: "oura-v3",
+    aggregationProvenance: "HEALTHKIT_STATISTICS",
     glucoseContext: null,
     sleepStage: "DEEP",
     rhythmClassification: null,
@@ -297,6 +298,7 @@ describe("buildFullBackupPayload disaster-recovery mode", () => {
           notesEncrypted: Buffer.from(measurementNote).toString("base64"),
           externalId: "oura-stage-deep",
           externalSourceVersion: "oura-v3",
+          aggregationProvenance: "HEALTHKIT_STATISTICS",
           glucoseContext: null,
           sleepStage: "DEEP",
           rhythmClassification: null,
@@ -371,3 +373,72 @@ describe("buildFullBackupPayload disaster-recovery mode", () => {
     ).rejects.toBe(failure);
   });
 });
+
+/**
+ * `aggregationProvenance` is what stops an export.xml source-day estimate from
+ * overwriting a native HealthKit statistic. A disaster-recovery backup that
+ * drops it restores a flattened authority ladder, so it rides the select and
+ * the disaster-recovery serialization the same way `externalSourceVersion`
+ * does — and stays out of the reduced portable shape, also like
+ * `externalSourceVersion`.
+ *
+ * Mutation check: drop `aggregationProvenance: true` from the select, or drop
+ * the field from the disaster-recovery arm, and the first two cases go red.
+ */
+describe("buildFullBackupPayload — aggregation provenance", () => {
+  it("selects the provenance column", async () => {
+    installSectionMocks();
+    const prisma = makePrisma();
+
+    await buildFullBackupPayload(prisma as never, "user-1", {
+      purpose: "disaster-recovery",
+      exportedAt: new Date("2026-07-20T00:00:00.000Z"),
+    });
+
+    expect(mocks.iterateMeasurementPages).toHaveBeenCalledWith(
+      prisma,
+      expect.anything(),
+      expect.objectContaining({ aggregationProvenance: true }),
+    );
+  });
+
+  it("carries the provenance into the disaster-recovery payload", async () => {
+    installSectionMocks();
+    const prisma = makePrisma();
+
+    const { payload } = await buildFullBackupPayload(
+      prisma as never,
+      "user-1",
+      {
+        purpose: "disaster-recovery",
+        exportedAt: new Date("2026-07-20T00:00:00.000Z"),
+      },
+    );
+
+    const rows = payload.measurements as Array<Record<string, unknown>>;
+    expect(rows[0]).toHaveProperty(
+      "aggregationProvenance",
+      "HEALTHKIT_STATISTICS",
+    );
+  });
+
+  it("leaves the provenance out of the reduced portable shape", async () => {
+    installSectionMocks();
+    const prisma = makePrisma();
+
+    const { payload } = await buildFullBackupPayload(
+      prisma as never,
+      "user-1",
+      {
+        purpose: "portable-export",
+        exportedAt: new Date("2026-07-20T00:00:00.000Z"),
+      },
+    );
+
+    const rows = payload.measurements as Array<Record<string, unknown>>;
+    // The portable arm carries the human-readable subset only — no
+    // externalSourceVersion, no glucoseContext, and no provenance either.
+    expect(rows[0]).not.toHaveProperty("aggregationProvenance");
+    expect(rows[0]).not.toHaveProperty("externalSourceVersion");
+  });
+});
diff --git a/src/lib/export/full-backup-payload.ts b/src/lib/export/full-backup-payload.ts
index 5e870a023..e0c813eb5 100644
--- a/src/lib/export/full-backup-payload.ts
+++ b/src/lib/export/full-backup-payload.ts
@@ -83,6 +83,7 @@ export async function buildFullBackupPayload(
           notesEncrypted: true,
           externalId: true,
           externalSourceVersion: true,
+          aggregationProvenance: true,
           glucoseContext: true,
           sleepStage: true,
           rhythmClassification: true,
@@ -112,6 +113,7 @@ export async function buildFullBackupPayload(
                     : null,
                   externalId: measurement.externalId,
                   externalSourceVersion: measurement.externalSourceVersion,
+                  aggregationProvenance: measurement.aggregationProvenance,
                   glucoseContext: measurement.glucoseContext,
                   sleepStage: measurement.sleepStage,
                   rhythmClassification: measurement.rhythmClassification,
diff --git a/src/lib/feature-flags/__tests__/coach-user-disable.test.tsx b/src/lib/feature-flags/__tests__/coach-user-disable.test.tsx
index c85a9a275..4dc6553aa 100644
--- a/src/lib/feature-flags/__tests__/coach-user-disable.test.tsx
+++ b/src/lib/feature-flags/__tests__/coach-user-disable.test.tsx
@@ -101,6 +101,7 @@ function buildUser(disableCoach: boolean): AuthUser {
     insurerName: null,
     insurerIkNumber: null,
     insuranceNumber: null,
+    lastReportPracticeName: null,
     cycleTrackingEnabled: false,
     modules: {},
   };
diff --git a/src/lib/measurements/__tests__/import-apple-health-export.test.ts b/src/lib/measurements/__tests__/import-apple-health-export.test.ts
index 389ba7d41..030f94be0 100644
--- a/src/lib/measurements/__tests__/import-apple-health-export.test.ts
+++ b/src/lib/measurements/__tests__/import-apple-health-export.test.ts
@@ -652,11 +652,7 @@ describe("streamParseExportXml — cumulative source-day estimates", () => {
     expect(prisma._measurements[0]).toMatchObject({
       value: 8_526,
       aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-      aggregationContributorCount: 2,
     });
-    expect(prisma._measurements[0]?.aggregationSelectedSourceHash).toMatch(
-      /^[a-f0-9]{64}$/,
-    );
     expect(result.cumulativeEstimates).toEqual({ days: 1, rows: 1 });
   });
 
@@ -675,7 +671,6 @@ describe("streamParseExportXml — cumulative source-day estimates", () => {
         type: mapping.measurementType,
         value: 30,
         aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-        aggregationContributorCount: 2,
       });
     },
   );
@@ -694,7 +689,6 @@ describe("streamParseExportXml — cumulative source-day estimates", () => {
       expect(prisma._measurements[0]).toMatchObject({
         type: mapping.measurementType,
         value: 50,
-        aggregationContributorCount: 1,
       });
     },
   );
@@ -712,7 +706,6 @@ describe("streamParseExportXml — cumulative source-day estimates", () => {
     expect(prisma._measurements).toHaveLength(1);
     expect(prisma._measurements[0]).toMatchObject({
       value: 100,
-      aggregationContributorCount: 1,
     });
   });
 
@@ -1171,7 +1164,6 @@ describe("streamParseExportXml — memory ceiling", () => {
     expect(prisma._measurements).toHaveLength(1);
     expect(prisma._measurements[0]).toMatchObject({
       value: 10_000,
-      aggregationContributorCount: 1,
     });
 
     // Heap delta should be modest — we tolerate a generous 100 MB so a
diff --git a/src/lib/measurements/__tests__/reconcile-external-measurement.test.ts b/src/lib/measurements/__tests__/reconcile-external-measurement.test.ts
index 1a755dc72..5a2d012fd 100644
--- a/src/lib/measurements/__tests__/reconcile-external-measurement.test.ts
+++ b/src/lib/measurements/__tests__/reconcile-external-measurement.test.ts
@@ -40,8 +40,6 @@ function row(overrides: Record<string, unknown> = {}): Record<string, unknown> {
     externalId: "sleep:new",
     externalSourceVersion: null,
     aggregationProvenance: null,
-    aggregationContributorCount: null,
-    aggregationSelectedSourceHash: null,
     glucoseContext: null,
     sleepStage: "DEEP",
     rhythmClassification: null,
@@ -224,8 +222,6 @@ describe("reconcileExternalMeasurement", () => {
       sleepStage: null,
       externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-20",
       aggregationProvenance: "HEALTHKIT_STATISTICS",
-      aggregationContributorCount: null,
-      aggregationSelectedSourceHash: null,
     });
     const { tx, measurement } = transaction([native]);
 
@@ -240,8 +236,6 @@ describe("reconcileExternalMeasurement", () => {
         sleepStage: null,
         externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-20",
         aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-        aggregationContributorCount: 2,
-        aggregationSelectedSourceHash: "source-hash",
       }),
       { exactExternalMatch: "update" },
     );
@@ -350,8 +344,6 @@ describe("reconcileExternalMeasurement", () => {
         sleepStage: null,
         externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-20",
         aggregationProvenance: "HEALTHKIT_STATISTICS",
-        aggregationContributorCount: null,
-        aggregationSelectedSourceHash: null,
       }),
       { exactExternalMatch: "update" },
     );
@@ -366,8 +358,6 @@ describe("reconcileExternalMeasurement", () => {
         data: expect.objectContaining({
           value: 8_600,
           aggregationProvenance: "HEALTHKIT_STATISTICS",
-          aggregationContributorCount: null,
-          aggregationSelectedSourceHash: null,
           syncVersion: { increment: 1 },
         }),
       }),
diff --git a/src/lib/measurements/drain-per-sample-cumulative.ts b/src/lib/measurements/drain-per-sample-cumulative.ts
index 9fb503f77..81973acc7 100644
--- a/src/lib/measurements/drain-per-sample-cumulative.ts
+++ b/src/lib/measurements/drain-per-sample-cumulative.ts
@@ -352,8 +352,6 @@ export async function drainPerSampleCumulative(
                   externalId,
                   deletedAt: null,
                   aggregationProvenance: "LEGACY_UNKNOWN",
-                  aggregationContributorCount: null,
-                  aggregationSelectedSourceHash: null,
                   syncVersion: { increment: 1 },
                   ...(slotIsFreeForTarget
                     ? { measuredAt: canonicalTimestamp }
diff --git a/src/lib/measurements/import-apple-health-export.ts b/src/lib/measurements/import-apple-health-export.ts
index 030cd5b10..320e9c46f 100644
--- a/src/lib/measurements/import-apple-health-export.ts
+++ b/src/lib/measurements/import-apple-health-export.ts
@@ -680,7 +680,10 @@ export async function streamParseExportXml(
           }
         }
         if (!selected) continue;
-        const [selectedSourceHash, selectedSubtotal] = selected;
+        // Only the subtotal is carried forward. The source hash stays an
+        // in-memory map key — it is what makes the max-subtotal selection
+        // above deterministic on a tie, and it is not persisted.
+        const [, selectedSubtotal] = selected;
         if (validateMeasurementRange(type, selectedSubtotal) !== null) {
           unknown[`${type}::aggregate_out_of_range`] =
             (unknown[`${type}::aggregate_out_of_range`] ?? 0) + 1;
@@ -704,8 +707,6 @@ export async function streamParseExportXml(
               sleepStage: null,
               deviceType: null,
               aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-              aggregationContributorCount: bySource.size,
-              aggregationSelectedSourceHash: selectedSourceHash,
             },
             { exactExternalMatch: "update" },
           ),
diff --git a/src/lib/onboarding/goals.ts b/src/lib/onboarding/goals.ts
index 3a9655502..bf5385d91 100644
--- a/src/lib/onboarding/goals.ts
+++ b/src/lib/onboarding/goals.ts
@@ -6,9 +6,11 @@
  * personalization signal: which dashboard tiles get promoted to the
  * top and made visible. Goals are NOT a clinical target store — the
  * targets surface (`/api/insights/targets`) is fully derived from
- * height/age/gender + clinical references. Their only leverage is
- * (a) dashboard tile pinning (here) and (b) reminder suggestions
- * (read by the reminders panel from `User.onboardingGoals`).
+ * height/age/gender + clinical references. Their only leverage is the
+ * one-time dashboard tile pinning below, applied by
+ * `/api/onboarding/step` while the layout is still unset. Nothing else
+ * reads `User.onboardingGoals` — the column is collected, seeded from
+ * once, and then inert.
  *
  * One home for the slug enum so the API validation
  * (`/api/onboarding/step`), the client picker, and the seeding all
diff --git a/src/lib/validations/backup.ts b/src/lib/validations/backup.ts
index 326bec119..854b1a7be 100644
--- a/src/lib/validations/backup.ts
+++ b/src/lib/validations/backup.ts
@@ -43,6 +43,7 @@ import {
   InjectionSite,
   IntakeAttributionSource,
   IntakeSource,
+  MeasurementAggregationProvenance,
   MeasurementSource,
   MeasurementType,
   MedicationCategory,
@@ -86,6 +87,12 @@ const measurementSchema = z
     notesEncrypted: base64BytesSchema.nullable().optional(),
     externalId: z.string().nullable().optional(),
     externalSourceVersion: z.string().nullable().optional(),
+    // Authority of a `stats:` aggregate. `.optional()` keeps every backup
+    // written before this field rode the payload parseable.
+    aggregationProvenance: z
+      .enum(MeasurementAggregationProvenance)
+      .nullable()
+      .optional(),
     glucoseContext: z.enum(GlucoseContext).nullable().optional(),
     sleepStage: z.enum(SleepStage).nullable().optional(),
     rhythmClassification: z.enum(RhythmClassification).nullable().optional(),
diff --git a/tests/integration/admin-backups-canonical-roundtrip.test.ts b/tests/integration/admin-backups-canonical-roundtrip.test.ts
index 506fad988..cfd86f30e 100644
--- a/tests/integration/admin-backups-canonical-roundtrip.test.ts
+++ b/tests/integration/admin-backups-canonical-roundtrip.test.ts
@@ -1130,4 +1130,142 @@ describe("canonical disaster-recovery backup round-trip", () => {
     );
     expect(invalidateUserData).not.toHaveBeenCalled();
   });
+
+  /**
+   * `aggregationProvenance` is what keeps an export.xml source-day estimate
+   * from overwriting a native HealthKit statistic. A backup that drops it
+   * restores a flattened authority ladder, so it has to survive the round
+   * trip — and a backup written before it rode the payload has to land in the
+   * documented repairable state rather than reproduce the ambiguity migration
+   * 0263 already repaired once.
+   *
+   * Mutation check: drop `aggregationProvenance` from the backup select or
+   * from the restore mapping and the first case goes red; drop the
+   * Apple-Health `stats:` fallback and the second goes red.
+   */
+  it("round-trips the aggregation provenance of a stats aggregate", async () => {
+    const prisma = getPrismaClient();
+    const admin = await seedAdminSession();
+    const payload = backupPayloadSchema.parse({
+      schemaVersion: "2",
+      exportedAt: "2026-07-25T00:00:00.000Z",
+      userId: admin.id,
+      measurements: [
+        {
+          id: "provenance-native",
+          type: "ACTIVITY_STEPS",
+          value: 8_600,
+          unit: "steps",
+          measuredAt: "2026-07-20T10:00:00.000Z",
+          source: "APPLE_HEALTH",
+          externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-20",
+          aggregationProvenance: "HEALTHKIT_STATISTICS",
+        },
+        {
+          id: "provenance-xml",
+          type: "ACTIVITY_STEPS",
+          value: 8_526,
+          unit: "steps",
+          measuredAt: "2026-07-21T10:00:00.000Z",
+          source: "APPLE_HEALTH",
+          externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-21",
+          aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
+        },
+      ],
+    });
+    const backup = await prisma.dataBackup.create({
+      data: {
+        userId: admin.id,
+        type: "PROVENANCE_ROUNDTRIP",
+        data: encrypt(JSON.stringify(payload)),
+      },
+    });
+
+    const response = await POST(
+      makeRequest(backup.id) as unknown as Parameters<typeof POST>[0],
+      { params: Promise.resolve({ id: backup.id }) },
+    );
+    expect(response.status).toBe(200);
+
+    expect(
+      await prisma.measurement.findMany({
+        where: { userId: admin.id },
+        orderBy: { measuredAt: "asc" },
+        select: { id: true, aggregationProvenance: true },
+      }),
+    ).toEqual([
+      {
+        id: "provenance-native",
+        aggregationProvenance: "HEALTHKIT_STATISTICS",
+      },
+      { id: "provenance-xml", aggregationProvenance: "EXPORT_XML_SOURCE_MAX" },
+    ]);
+  });
+
+  it("marks an unlabelled Apple Health stats aggregate as legacy-unknown on restore", async () => {
+    const prisma = getPrismaClient();
+    const admin = await seedAdminSession();
+    // A backup taken before the provenance rode the payload: no field at all.
+    const payload = backupPayloadSchema.parse({
+      schemaVersion: "2",
+      exportedAt: "2026-07-25T00:00:00.000Z",
+      userId: admin.id,
+      measurements: [
+        {
+          id: "legacy-apple-stats",
+          type: "ACTIVITY_STEPS",
+          value: 8_526,
+          unit: "steps",
+          measuredAt: "2026-07-20T10:00:00.000Z",
+          source: "APPLE_HEALTH",
+          externalId: "stats:HKQuantityTypeIdentifierStepCount:2026-07-20",
+        },
+        {
+          // Another provider's cumulative daily. It mints a `stats:` id too but
+          // has never carried provenance, so inventing one would be a lie.
+          id: "legacy-fitbit-stats",
+          type: "ACTIVITY_STEPS",
+          value: 7_100,
+          unit: "steps",
+          measuredAt: "2026-07-21T10:00:00.000Z",
+          source: "FITBIT",
+          externalId: "stats:steps",
+        },
+        {
+          // An ordinary point reading never had provenance either.
+          id: "legacy-point-row",
+          type: "PULSE",
+          value: 61,
+          unit: "bpm",
+          measuredAt: "2026-07-22T10:00:00.000Z",
+          source: "MANUAL",
+        },
+      ],
+    });
+    const backup = await prisma.dataBackup.create({
+      data: {
+        userId: admin.id,
+        type: "PROVENANCE_LEGACY",
+        data: encrypt(JSON.stringify(payload)),
+      },
+    });
+
+    const response = await POST(
+      makeRequest(backup.id) as unknown as Parameters<typeof POST>[0],
+      { params: Promise.resolve({ id: backup.id }) },
+    );
+    expect(response.status).toBe(200);
+
+    expect(
+      await prisma.measurement.findMany({
+        where: { userId: admin.id },
+        orderBy: { measuredAt: "asc" },
+        select: { id: true, aggregationProvenance: true },
+      }),
+    ).toEqual([
+      { id: "legacy-apple-stats", aggregationProvenance: "LEGACY_UNKNOWN" },
+      { id: "legacy-fitbit-stats", aggregationProvenance: null },
+      { id: "legacy-point-row", aggregationProvenance: null },
+    ]);
+  });
 });
diff --git a/tests/integration/measurement-identity-reconcile.test.ts b/tests/integration/measurement-identity-reconcile.test.ts
index 9ebfa33ba..21ebecc12 100644
--- a/tests/integration/measurement-identity-reconcile.test.ts
+++ b/tests/integration/measurement-identity-reconcile.test.ts
@@ -114,8 +114,6 @@ describe("external measurement identity reconciliation (real Postgres)", () => {
             measuredAt: new Date("2026-07-20T09:00:00.000Z"),
             sleepStage: null,
             aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-            aggregationContributorCount: 2,
-            aggregationSelectedSourceHash: "xml-source-hash",
           },
         ),
       },
@@ -132,8 +130,6 @@ describe("external measurement identity reconciliation (real Postgres)", () => {
           externalSourceVersion: "native-v1",
           deviceType: "Apple Watch",
           aggregationProvenance: "HEALTHKIT_STATISTICS",
-          aggregationContributorCount: null,
-          aggregationSelectedSourceHash: null,
         }),
       },
     });
@@ -147,8 +143,6 @@ describe("external measurement identity reconciliation (real Postgres)", () => {
         measuredAt: nativeMeasuredAt,
         sleepStage: null,
         aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-        aggregationContributorCount: 2,
-        aggregationSelectedSourceHash: "xml-source-hash",
       }),
       { exactExternalMatch: "update" },
     );
@@ -171,8 +165,6 @@ describe("external measurement identity reconciliation (real Postgres)", () => {
       externalSourceVersion: "native-v1",
       deviceType: "Apple Watch",
       aggregationProvenance: "HEALTHKIT_STATISTICS",
-      aggregationContributorCount: null,
-      aggregationSelectedSourceHash: null,
     });
     expect(
       await prisma.measurement.findUniqueOrThrow({
@@ -194,8 +186,6 @@ describe("external measurement identity reconciliation (real Postgres)", () => {
         externalSourceVersion: "native-v2",
         deviceType: "Apple Watch",
         aggregationProvenance: "HEALTHKIT_STATISTICS",
-        aggregationContributorCount: null,
-        aggregationSelectedSourceHash: null,
       }),
       { exactExternalMatch: "update" },
     );
diff --git a/tests/integration/measurements-batch.test.ts b/tests/integration/measurements-batch.test.ts
index d0e4c9ee7..1617bbc5f 100644
--- a/tests/integration/measurements-batch.test.ts
+++ b/tests/integration/measurements-batch.test.ts
@@ -601,8 +601,6 @@ describe("POST /api/measurements/batch (real Postgres)", () => {
       expect(stored[0]!.value).toBeCloseTo(5200, 5);
       expect(stored[0]).toMatchObject({
         aggregationProvenance: "HEALTHKIT_STATISTICS",
-        aggregationContributorCount: null,
-        aggregationSelectedSourceHash: null,
         syncVersion: 2,
       });
     });
@@ -1217,7 +1215,6 @@ describe("POST /api/measurements/batch (real Postgres)", () => {
       expect(estimated[0]).toMatchObject({
         value: 8_526,
         aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-        aggregationContributorCount: 2,
         syncVersion: 1,
       });
 
@@ -1235,8 +1232,6 @@ describe("POST /api/measurements/batch (real Postgres)", () => {
       expect(canonical[0]).toMatchObject({
         value: 8_600,
         aggregationProvenance: "HEALTHKIT_STATISTICS",
-        aggregationContributorCount: null,
-        aggregationSelectedSourceHash: null,
         syncVersion: 2,
       });
     });
@@ -1297,7 +1292,6 @@ describe("POST /api/measurements/batch (real Postgres)", () => {
       expect(rows[0]).toMatchObject({
         value: 8_526,
         aggregationProvenance: "EXPORT_XML_SOURCE_MAX",
-        aggregationContributorCount: 2,
         syncVersion: 2,
       });
     });