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 ('4e5ce4e5dba5230bc7727e4d42a93838','0','18.119.118.99','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714378869','calendar.php?sid=ad9221a0461e420be2e6d8bcd24d702b','0','0','')
mysql error: Duplicate entry '4e5ce4e5dba5230bc7727e4d42a93838' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 29.04.2024 @ 04:21
Script: /wbb2/calendar.php?sid=ad9221a0461e420be2e6d8bcd24d702b
Referer: