diff --git a/src/lib/__tests__/dashboard-layout.test.ts b/src/lib/__tests__/dashboard-layout.test.ts
index 4a0ddc4a9..ccebc0c15 100644
--- a/src/lib/__tests__/dashboard-layout.test.ts
+++ b/src/lib/__tests__/dashboard-layout.test.ts
@@ -162,6 +162,28 @@ describe("DEFAULT_DASHBOARD_LAYOUT contract", () => {
       DEFAULT_DASHBOARD_LAYOUT.widgets.map((w) => w.id).sort(),
     );
   });
+
+  it("drops widget ids the current build no longer knows about", () => {
+    // v1.4.28 retired the `glp1` tile. Users who saved a layout before
+    // then still have the orphan id in `dashboardWidgetsJson`; the PUT
+    // route's Zod enum would reject the entire blob on the next save
+    // round-trip, surfacing the "Speichern fehlgeschlagen" toast.
+    // The resolver filters unknown ids on read so the GET shape is
+    // current-build-safe and the next save round-trips cleanly.
+    const stored = {
+      version: 1,
+      widgets: [
+        { id: "weight", visible: true, tileVisible: true, order: 0 },
+        { id: "glp1", visible: true, tileVisible: true, order: 1 },
+        { id: "bp", visible: true, tileVisible: true, order: 2 },
+      ],
+    };
+    const resolved = resolveDashboardLayout(stored);
+    const ids = resolved.widgets.map((w) => w.id);
+    expect(ids).not.toContain("glp1");
+    expect(ids).toContain("weight");
+    expect(ids).toContain("bp");
+  });
 });
 
 /**
diff --git a/src/lib/dashboard-layout.ts b/src/lib/dashboard-layout.ts
index 7c9b184b4..0c6b542b0 100644
--- a/src/lib/dashboard-layout.ts
+++ b/src/lib/dashboard-layout.ts
@@ -229,13 +229,22 @@ export function resolveDashboardLayout(raw: unknown): DashboardLayout {
     return DEFAULT_DASHBOARD_LAYOUT;
   }
 
+  // Drop widget ids the current build does not know about. v1.4.28
+  // retired the `glp1` tile; any user who saved a layout before then
+  // still has the orphan id in `dashboardWidgetsJson`, and the PUT
+  // route's Zod enum rejects the entire blob on the next save round-
+  // trip. Filtering on read keeps the GET shape current-build-safe
+  // and lets the Settings UI re-PUT a clean array.
+  const knownIds = new Set<string>(DASHBOARD_WIDGET_IDS);
+  const filtered = candidate.widgets.filter((w) => knownIds.has(w.id));
+
   // Merge with defaults so new widgets introduced in later versions show up
   // automatically (invisible by default, users opt-in).
-  const savedIds = new Set(candidate.widgets.map((w) => w.id));
+  const savedIds = new Set(filtered.map((w) => w.id));
   const missing = DEFAULT_DASHBOARD_LAYOUT.widgets.filter(
     (w) => !savedIds.has(w.id),
   );
-  const maxOrder = Math.max(0, ...candidate.widgets.map((w) => w.order));
+  const maxOrder = Math.max(0, ...filtered.map((w) => w.order));
   const appended = missing.map((w, i) => ({
     ...w,
     visible: false, // default-invisible on auto-upgrade
@@ -247,7 +256,7 @@ export function resolveDashboardLayout(raw: unknown): DashboardLayout {
   // never had the field (the v1.4.15 schema upgrade). Users who saved
   // a layout before this release see no behavioural change until they
   // explicitly toggle the new strip switch.
-  const normalized = candidate.widgets.map((w) => ({
+  const normalized = filtered.map((w) => ({
     ...w,
     tileVisible: typeof w.tileVisible === "boolean" ? w.tileVisible : w.visible,
   }));