diff --git a/database/migrations/2025_01_21_134746_add_unique_index_to_room_id_on_season_rooms.php b/database/migrations/2025_01_21_134746_add_unique_index_to_room_id_on_season_rooms.php
index 8a6dc9e10a5..7451783f329 100644
--- a/database/migrations/2025_01_21_134746_add_unique_index_to_room_id_on_season_rooms.php
+++ b/database/migrations/2025_01_21_134746_add_unique_index_to_room_id_on_season_rooms.php
@@ -1,5 +1,8 @@
 <?php
 
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the GNU Affero General Public License v3.0.
+// See the LICENCE file in the repository root for full licence text.
+
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;