-class AddNameUniqueIndexToRepositories < ActiveRecord::Migration
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class AddNameUniqueIndexToRepositories < ActiveRecord::Migration[4.2]
def up
remove_index :repositories, :name
add_index :repositories, :name, :unique => true