diff --git a/db/docs/batched_background_migrations/backfill_user_detail_onboarding_url.yml b/db/docs/batched_background_migrations/backfill_user_detail_onboarding_url.yml
index c133e9125d898b50ea88a2339bb00ef365b68688..c34b7c6f2baaaff3a83265b39f4edb45b898968a 100644
--- a/db/docs/batched_background_migrations/backfill_user_detail_onboarding_url.yml
+++ b/db/docs/batched_background_migrations/backfill_user_detail_onboarding_url.yml
@@ -5,4 +5,4 @@ feature_category: onboarding
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/195542
 milestone: '18.2'
 queued_migration_version: 20250624002740
-finalized_by: # version of the migration that finalized this BBM
+finalized_by: '20250918232145'
diff --git a/db/post_migrate/20250918232145_finalize_hk_backfill_user_detail_onboarding_url.rb b/db/post_migrate/20250918232145_finalize_hk_backfill_user_detail_onboarding_url.rb
new file mode 100644
index 0000000000000000000000000000000000000000..442d9fdaf9b5d84d12b604cdcf4df580a0773ace
--- /dev/null
+++ b/db/post_migrate/20250918232145_finalize_hk_backfill_user_detail_onboarding_url.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class FinalizeHkBackfillUserDetailOnboardingUrl < Gitlab::Database::Migration[2.3]
+  milestone '18.5'
+
+  disable_ddl_transaction!
+
+  restrict_gitlab_migration gitlab_schema: :gitlab_main
+
+  def up
+    ensure_batched_background_migration_is_finished(
+      job_class_name: 'BackfillUserDetailOnboardingUrl',
+      table_name: :user_details,
+      column_name: :user_id,
+      job_arguments: [],
+      finalize: true
+    )
+  end
+
+  def down; end
+end
diff --git a/db/schema_migrations/20250918232145 b/db/schema_migrations/20250918232145
new file mode 100644
index 0000000000000000000000000000000000000000..52ab437a65685abe68615b95b677f710fbb9aa6d
--- /dev/null
+++ b/db/schema_migrations/20250918232145
@@ -0,0 +1 @@
+c9c668296338bd5e7aa3267b3c015782b62ce6e7e4f8a6420be853defdcc9787
\ No newline at end of file