diff --git a/db/docs/batched_background_migrations/backfill_google_instance_audit_event_destinations.yml b/db/docs/batched_background_migrations/backfill_google_instance_audit_event_destinations.yml
index d4c3ee948d40da7121a751f491ec4f83131fd5d0..3a145198b570456c1748bfd8a634796804a31ee6 100644
--- a/db/docs/batched_background_migrations/backfill_google_instance_audit_event_destinations.yml
+++ b/db/docs/batched_background_migrations/backfill_google_instance_audit_event_destinations.yml
@@ -1,8 +1,9 @@
 ---
 migration_job_name: BackfillGoogleInstanceAuditEventDestinations
-description: Backfill the audit_events_instance_google_cloud_logging_configurations table to audit_events_instance_external_streaming_destinations
+description: Backfill the audit_events_instance_google_cloud_logging_configurations
+  table to audit_events_instance_external_streaming_destinations
 feature_category: audit_events
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184058
 milestone: '17.11'
 queued_migration_version: 20250310155742
-finalized_by: # version of the migration that finalized this BBM
+finalized_by: '20250909232956'
diff --git a/db/post_migrate/20250909232956_finalize_hk_backfill_google_instance_audit_event_destinations.rb b/db/post_migrate/20250909232956_finalize_hk_backfill_google_instance_audit_event_destinations.rb
new file mode 100644
index 0000000000000000000000000000000000000000..48c13c14ae20feb3f6986b418dd47a086dcf28d0
--- /dev/null
+++ b/db/post_migrate/20250909232956_finalize_hk_backfill_google_instance_audit_event_destinations.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class FinalizeHkBackfillGoogleInstanceAuditEventDestinations < 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: 'BackfillGoogleInstanceAuditEventDestinations',
+      table_name: :audit_events_instance_google_cloud_logging_configurations,
+      column_name: :id,
+      job_arguments: [],
+      finalize: true
+    )
+  end
+
+  def down; end
+end
diff --git a/db/schema_migrations/20250909232956 b/db/schema_migrations/20250909232956
new file mode 100644
index 0000000000000000000000000000000000000000..e53b9b2241c725ba9db5353b999465d350885841
--- /dev/null
+++ b/db/schema_migrations/20250909232956
@@ -0,0 +1 @@
+421f36cad16bc350569da10445c663f234ad78dedbb2158dd0b0314394fb2a1d
\ No newline at end of file