SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 v2): Invalid SQL: INSERT INTO bb2_privatemessagereceipts (privatemessageid, recipientid, recipient, blindcopy) VALUES
mysql error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
mysql error number: 1064
mysql version: 5.7.35-38
php version: 5.3.29
Date: 19.04.2024 @ 03:06
Script: /index.php?sid=ec58076e7d9e4d60f9aaae6037ee34d3
Referer: https://forumok.eu/markread.php?sid=a4ebade360016c27101dc524b91a9ef1