diff --git a/supabase/migrations/20260705210000_retrieval_owner_filter_sentinel.sql b/supabase/migrations/20260705210000_retrieval_owner_filter_sentinel.sql
index 9a973f440..7cdaf6ccf 100644
--- a/supabase/migrations/20260705210000_retrieval_owner_filter_sentinel.sql
+++ b/supabase/migrations/20260705210000_retrieval_owner_filter_sentinel.sql
@@ -528,6 +528,11 @@ as $$
   limit match_count;
 $$;
 
+-- The live/preview database may carry a match_document_chunks_text OUT signature
+-- that differs from this batching rewrite (see 20260702170000 no-op note).
+-- PostgreSQL rejects CREATE OR REPLACE when OUT columns change.
+drop function if exists public.match_document_chunks_text(text, integer, uuid[], uuid);
+
 create or replace function public.match_document_chunks_text(
   query_text text,
   match_count integer default 12,
diff --git a/supabase/migrations/20260706120000_promote_remaining_indexed_documents_public.sql b/supabase/migrations/20260706120000_promote_remaining_indexed_documents_public.sql
index 36edb7343..dfe343cea 100644
--- a/supabase/migrations/20260706120000_promote_remaining_indexed_documents_public.sql
+++ b/supabase/migrations/20260706120000_promote_remaining_indexed_documents_public.sql
@@ -42,12 +42,12 @@ from promoted_public_documents pd
 where dmc.document_id = pd.id;
 
 update public.document_table_facts dtf
-set owner_id = null, updated_at = now()
+set owner_id = null
 from promoted_public_documents pd
 where dtf.document_id = pd.id;
 
 update public.document_embedding_fields def
-set owner_id = null, updated_at = now()
+set owner_id = null
 from promoted_public_documents pd
 where def.document_id = pd.id;
 
diff --git a/supabase/schema.sql b/supabase/schema.sql
index 357ed9180..08b98df4c 100644
--- a/supabase/schema.sql
+++ b/supabase/schema.sql
@@ -2663,6 +2663,8 @@ as $$
   limit match_count;
 $$;
 
+drop function if exists public.match_document_chunks_text(text, integer, uuid[], uuid);
+
 create or replace function public.match_document_chunks_text(
   query_text text,
   match_count integer default 12,
diff --git a/tests/supabase-schema.test.ts b/tests/supabase-schema.test.ts
index 5aeb3ce89..a721f4454 100644
--- a/tests/supabase-schema.test.ts
+++ b/tests/supabase-schema.test.ts
@@ -38,6 +38,10 @@ const phase7RetrievalPerformanceMigration = readFileSync(
   new URL("../supabase/migrations/20260626020000_phase7_retrieval_rpc_performance.sql", import.meta.url),
   "utf8",
 ).replace(/\s+/g, " ");
+const retrievalOwnerFilterSentinelMigration = readFileSync(
+  new URL("../supabase/migrations/20260705210000_retrieval_owner_filter_sentinel.sql", import.meta.url),
+  "utf8",
+).replace(/\s+/g, " ");
 const atomicReindexMigration = readFileSync(
   new URL("../supabase/migrations/20260628000000_atomic_reindex_generation_commit.sql", import.meta.url),
   "utf8",
@@ -797,6 +801,12 @@ describe("Supabase Preview replay guards", () => {
     );
   });
 
+  it("drops match_document_chunks_text before retrieval owner sentinel rewrites it", () => {
+    expect(retrievalOwnerFilterSentinelMigration).toContain(
+      "drop function if exists public.match_document_chunks_text(text, integer, uuid[], uuid)",
+    );
+  });
+
   it("guards pg_cron retention schedules for preview branches without cron.job", () => {
     for (const sql of [ragQueriesRetentionMigration, ragRetrievalLogsRetentionMigration]) {
       expect(sql).toContain("to_regnamespace('cron')");