diff --git a/prisma/migrations/0098_app_settings_global_toggles_drift_fix/migration.sql b/prisma/migrations/0098_app_settings_global_toggles_drift_fix/migration.sql
new file mode 100644
index 000000000..6aea03c79
--- /dev/null
+++ b/prisma/migrations/0098_app_settings_global_toggles_drift_fix/migration.sql
@@ -0,0 +1,20 @@
+-- 0098_app_settings_global_toggles_drift_fix
+-- Four `app_settings` columns have been on `prisma/schema.prisma` since the
+-- per-channel global notification toggles + admin default-locale work but
+-- never landed in the migration history (applied via `prisma db push` to
+-- existing environments but not committed as a migration). The drift is
+-- invisible on a database kept in sync via `db push`, but a database built
+-- from migrations alone is missing the columns — and the admin settings
+-- read path (`/api/admin/settings`) selects `default_locale`, so a fresh
+-- deploy reports `column "default_locale" does not exist` on first read.
+--
+-- Same class of drift as 0025_user_locale_drift_fix. Each add uses
+-- `IF NOT EXISTS` with the schema default, so the migration is a safe no-op
+-- against any environment already carrying the columns and a clean add
+-- against one built strictly from this migrations directory (CI test
+-- containers, fresh deploys, demo seeds).
+ALTER TABLE "app_settings"
+  ADD COLUMN IF NOT EXISTS "default_locale" TEXT NOT NULL DEFAULT 'de',
+  ADD COLUMN IF NOT EXISTS "telegram_global" BOOLEAN NOT NULL DEFAULT true,
+  ADD COLUMN IF NOT EXISTS "ntfy_global" BOOLEAN NOT NULL DEFAULT true,
+  ADD COLUMN IF NOT EXISTS "web_push_global" BOOLEAN NOT NULL DEFAULT true;
diff --git a/scripts/seed-demo.ts b/scripts/seed-demo.ts
index 529e543a8..44d4db708 100644
--- a/scripts/seed-demo.ts
+++ b/scripts/seed-demo.ts
@@ -247,14 +247,14 @@ async function seed() {
         const takenTime = new Date(date);
         takenTime.setHours(8, Math.floor(Math.random() * 45), 0);
         await client.query(
-          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-           VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5)`,
+          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+           VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5, $5)`,
           [cuid(), userId, med1Id, date, takenTime],
         );
       } else {
         await client.query(
-          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-           VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4)`,
+          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+           VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4, $4)`,
           [cuid(), userId, med1Id, date],
         );
       }
@@ -265,14 +265,14 @@ async function seed() {
         const takenTime = new Date(date);
         takenTime.setHours(8, Math.floor(5 + Math.random() * 50), 0);
         await client.query(
-          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-           VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5)`,
+          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+           VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5, $5)`,
           [cuid(), userId, med2Id, date, takenTime],
         );
       } else {
         await client.query(
-          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-           VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4)`,
+          `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+           VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4, $4)`,
           [cuid(), userId, med2Id, date],
         );
       }
@@ -284,14 +284,14 @@ async function seed() {
           const takenTime = new Date(date);
           takenTime.setHours(20, Math.floor(Math.random() * 60), 0);
           await client.query(
-            `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-             VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5)`,
+            `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+             VALUES ($1, $2, $3, $4, $5, false, 'WEB', $5, $5)`,
             [cuid(), userId, med3Id, date, takenTime],
           );
         } else {
           await client.query(
-            `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at)
-             VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4)`,
+            `INSERT INTO medication_intake_events (id, user_id, medication_id, scheduled_for, taken_at, skipped, source, created_at, updated_at)
+             VALUES ($1, $2, $3, $4, NULL, true, 'WEB', $4, $4)`,
             [cuid(), userId, med3Id, date],
           );
         }