diff --git a/frontend/supabase/migrations/20260718020000_profiles_service_role_upsert_grants.sql b/frontend/supabase/migrations/20260718020000_profiles_service_role_upsert_grants.sql
deleted file mode 100644
index 3e44d20b..00000000
--- a/frontend/supabase/migrations/20260718020000_profiles_service_role_upsert_grants.sql
+++ /dev/null
@@ -1,53 +0,0 @@
-begin;
-
-grant select, insert, update on table public.profiles to service_role;
-
-grant select (
-  id,
-  email,
-  credits,
-  created_at,
-  updated_at,
-  name,
-  birth_date,
-  birth_time,
-  country_code,
-  province_code,
-  city_code,
-  district_code,
-  latitude,
-  longitude,
-  timezone_offset
-) on public.profiles to service_role;
-
-grant insert (
-  id,
-  email,
-  name,
-  birth_date,
-  birth_time,
-  country_code,
-  province_code,
-  city_code,
-  district_code,
-  latitude,
-  longitude,
-  timezone_offset,
-  updated_at
-) on public.profiles to service_role;
-
-grant update (
-  name,
-  birth_date,
-  birth_time,
-  country_code,
-  province_code,
-  city_code,
-  district_code,
-  latitude,
-  longitude,
-  timezone_offset,
-  updated_at
-) on public.profiles to service_role;
-
-commit;
diff --git a/frontend/supabase/migrations/20260718080000_profiles_service_role_account_upsert_selects.sql b/frontend/supabase/migrations/20260718080000_profiles_service_role_account_upsert_selects.sql
new file mode 100644
index 00000000..b84d4994
--- /dev/null
+++ b/frontend/supabase/migrations/20260718080000_profiles_service_role_account_upsert_selects.sql
@@ -0,0 +1,9 @@
+begin;
+
+-- Existing-row upserts must read every submitted column to resolve the result.
+grant select (
+  district_code,
+  updated_at
+) on table public.profiles to service_role;
+
+commit;
diff --git a/frontend/supabase/migrations/20260717010000_chart_profiles.sql b/frontend/supabase/migrations/20260718100000_repair_missing_chart_profiles.sql
similarity index 100%
rename from frontend/supabase/migrations/20260717010000_chart_profiles.sql
rename to frontend/supabase/migrations/20260718100000_repair_missing_chart_profiles.sql
diff --git a/frontend/supabase/migrations/20260717020000_synastry_reports.sql b/frontend/supabase/migrations/20260718101000_repair_missing_synastry_reports.sql
similarity index 100%
rename from frontend/supabase/migrations/20260717020000_synastry_reports.sql
rename to frontend/supabase/migrations/20260718101000_repair_missing_synastry_reports.sql
diff --git a/frontend/supabase/migrations/20260718010000_recover_missing_profile_rows.sql b/frontend/supabase/migrations/20260718102000_recover_missing_profile_rows.sql
similarity index 100%
rename from frontend/supabase/migrations/20260718010000_recover_missing_profile_rows.sql
rename to frontend/supabase/migrations/20260718102000_recover_missing_profile_rows.sql
diff --git a/frontend/tests/profile-persistence.test.ts b/frontend/tests/profile-persistence.test.ts
index 6694a689..8fbd5007 100644
--- a/frontend/tests/profile-persistence.test.ts
+++ b/frontend/tests/profile-persistence.test.ts
@@ -19,3 +19,21 @@ test("account route can fall back when coordinate columns are not deployed", ()
   assert.match(source, /withoutCoordinates/);
   assert.match(source, /PGRST204|42703|schema cache|column/i);
 });
+
+test("service role can read every column used by account profile upserts", () => {
+  // Given: the least-privilege grant omitted two columns submitted by /api/account.
+  const migration = readFileSync(
+    new URL(
+      "../supabase/migrations/20260718080000_profiles_service_role_account_upsert_selects.sql",
+      import.meta.url,
+    ),
+    "utf8",
+  );
+
+  // When: the corrective migration defines the account-upsert read grant.
+  // Then: PostgREST can read both submitted columns while resolving existing rows.
+  assert.match(
+    migration,
+    /grant\s+select\s*\(\s*district_code\s*,\s*updated_at\s*\)\s*on\s+table\s+public\.profiles\s+to\s+service_role/is,
+  );
+});
diff --git a/tests/test_supabase_migration_versions.py b/tests/test_supabase_migration_versions.py
new file mode 100644
index 00000000..704ebd32
--- /dev/null
+++ b/tests/test_supabase_migration_versions.py
@@ -0,0 +1,23 @@
+from collections import defaultdict
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+MIGRATIONS = ROOT / "frontend" / "supabase" / "migrations"
+
+
+def test_supabase_migration_versions_are_unique() -> None:
+    # Given: Supabase records the timestamp prefix as the migration identity.
+    versions: defaultdict[str, list[str]] = defaultdict(list)
+
+    # When: every local migration is grouped by that identity.
+    for migration in sorted(MIGRATIONS.glob("*.sql")):
+        versions[migration.name.split("_", maxsplit=1)[0]].append(migration.name)
+
+    # Then: no migration can be silently skipped behind a duplicate identity.
+    duplicates = {
+        version: names
+        for version, names in versions.items()
+        if len(names) > 1
+    }
+    assert duplicates == {}
diff --git a/tests/test_supabase_user_data_contract.py b/tests/test_supabase_user_data_contract.py
index 27d96533..4a8728c9 100644
--- a/tests/test_supabase_user_data_contract.py
+++ b/tests/test_supabase_user_data_contract.py
@@ -28,14 +28,14 @@ CHART_PROFILE_MIGRATION = (
     / "frontend"
     / "supabase"
     / "migrations"
-    / "20260717010000_chart_profiles.sql"
+    / "20260718100000_repair_missing_chart_profiles.sql"
 )
 SYNASTRY_REPORT_MIGRATION = (
     Path(__file__).resolve().parents[1]
     / "frontend"
     / "supabase"
     / "migrations"
-    / "20260717020000_synastry_reports.sql"
+    / "20260718101000_repair_missing_synastry_reports.sql"
 )
 PAGE = Path(__file__).resolve().parents[1] / "frontend" / "src" / "app" / "page.tsx"
 CHART_PROFILE_ROUTE = Path(__file__).resolve().parents[1] / "frontend" / "src" / "app" / "api" / "chart-profiles" / "route.ts"