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 ('52dadf884496f860ad87100640c019ca','0','18.119.172.243','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716289026','search.php?action=user&userid=650&sid=6b822b6491ab7faf66c16de13fb2bf75','0','0','')
mysql error: Duplicate entry '52dadf884496f860ad87100640c019ca' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 21.05.2024 @ 06:57
Script: /wbb2/search.php?action=user&userid=650&sid=6b822b6491ab7faf66c16de13fb2bf75
Referer: