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 ('437d070fcde2248ba26c601b75e7ba94','0','3.15.202.214','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714464711','calendar.php?sid=8dd84baa44a68078aaf68adbe610cdbc','0','0','')
mysql error: Duplicate entry '437d070fcde2248ba26c601b75e7ba94' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 30.04.2024 @ 04:11
Script: /wbb2/calendar.php?sid=8dd84baa44a68078aaf68adbe610cdbc
Referer: