diff --git a/db/docs/batched_background_migrations/backfill_amazon_group_audit_event_destinations.yml b/db/docs/batched_background_migrations/backfill_amazon_group_audit_event_destinations.yml
index d878eeaa5806567955b37ad98684fb1e2cd8b2c4..58e132b053ddcdd728b2ab93264913c73060b1b8 100644
--- a/db/docs/batched_background_migrations/backfill_amazon_group_audit_event_destinations.yml
+++ b/db/docs/batched_background_migrations/backfill_amazon_group_audit_event_destinations.yml
@@ -5,4 +5,4 @@ feature_category: audit_events
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183042
 milestone: '17.11'
 queued_migration_version: 20250310150446
-finalized_by: # version of the migration that finalized this BBM
+finalized_by: '20250914233848'
diff --git a/db/post_migrate/20250914233848_finalize_hk_backfill_amazon_group_audit_event_destinations.rb b/db/post_migrate/20250914233848_finalize_hk_backfill_amazon_group_audit_event_destinations.rb
new file mode 100644
index 0000000000000000000000000000000000000000..a93b51ec22db5b933bd3917151dc05fb9847427c
--- /dev/null
+++ b/db/post_migrate/20250914233848_finalize_hk_backfill_amazon_group_audit_event_destinations.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class FinalizeHkBackfillAmazonGroupAuditEventDestinations < Gitlab::Database::Migration[2.3]
+  milestone '18.4'
+
+  disable_ddl_transaction!
+
+  restrict_gitlab_migration gitlab_schema: :gitlab_main
+
+  def up
+    ensure_batched_background_migration_is_finished(
+      job_class_name: 'BackfillAmazonGroupAuditEventDestinations',
+      table_name: :audit_events_amazon_s3_configurations,
+      column_name: :id,
+      job_arguments: [],
+      finalize: true
+    )
+  end
+
+  def down; end
+end
diff --git a/db/schema_migrations/20250914233848 b/db/schema_migrations/20250914233848
new file mode 100644
index 0000000000000000000000000000000000000000..4d862b6ccca05ada77b435dc177b3dc09043a538
--- /dev/null
+++ b/db/schema_migrations/20250914233848
@@ -0,0 +1 @@
+9ef6a6dce13ec9dc3d7099ef78f025d233a665f84d04dde0ecd287ab10292fb5
\ No newline at end of file