-class RenameAuthKeysUserIndex < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class RenameAuthKeysUserIndex < ActiveRecord::Migration[4.2]
# Rails' default name for this index is so long, Rails can't modify
# the index later, because the autogenerated temporary name exceeds
# PostgreSQL's 64-character limit. This migration gives the index