SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 v2): Invalid SQL: INSERT INTO bb2_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('251a171b36a0f44dbdee309d1c229b24','0','3.149.233.62','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716097495','usercp.php?action=buddy&add=395&sid=49c4a56ac95c08d2b56c2694b4062fb7','0','0','')
mysql error: Duplicate entry '251a171b36a0f44dbdee309d1c229b24' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.35-38
php version: 5.3.29
Date: 19.05.2024 @ 08:44
Script: /usercp.php?action=buddy&add=395&sid=49c4a56ac95c08d2b56c2694b4062fb7
Referer: http://www.forumok.eu/usercp.php?action=buddy&add=395&sid=49c4a56ac95c08d2b56c2694b4062fb7