SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb2_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('51cb17b15748e758d1861c6b7dad0847','0','3.22.71.188','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715861100','thread.php?threadid=5336&sid=e9eb7e80ee39c72a677204f884cbdd85','0','0','')
mysql error: Duplicate entry '51cb17b15748e758d1861c6b7dad0847' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 16.05.2024 @ 08:05
Script: /wbb2/thread.php?threadid=5336&sid=e9eb7e80ee39c72a677204f884cbdd85
Referer: