diff --git a/files/lib/data/message/MessageAction.class.php b/files/lib/data/message/MessageAction.class.php
index 6ca6ec9..f17702f 100644
--- a/files/lib/data/message/MessageAction.class.php
+++ b/files/lib/data/message/MessageAction.class.php
@@ -1,12 +1,12 @@
 <?php
 
 /*
- * Copyright (c) 2010-2022 Tim Düsterhus.
+ * Copyright (c) 2010-2023 Tim Düsterhus.
  *
  * Use of this software is governed by the Business Source License
  * included in the LICENSE file.
  *
- * Change Date: 2026-09-17
+ * Change Date: 2027-02-22
  *
  * On the date above, in accordance with the Business Source
  * License, use of this software will be governed by version 2
@@ -43,6 +43,7 @@ class MessageAction extends AbstractDatabaseObjectAction
     public function create()
     {
         $message = parent::create();
+        \assert($message instanceof Message);
 
         if (isset($this->parameters['updateTimestamp']) && $this->parameters['updateTimestamp']) {
             $sql = "UPDATE  chat1_room_to_user