SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('b2c11bf401c9c7147a101953a8b36d07','0','18.188.39.178','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715776029','board.php?boardid=576&sid=c3c36e1c4b27c02ee09c2bbe4a5b29cd','0','0','')
mysql error: Duplicate entry 'b2c11bf401c9c7147a101953a8b36d07' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 14:27
Script: /board.php?boardid=576&sid=c3c36e1c4b27c02ee09c2bbe4a5b29cd
Referer: http://wehrbauten.de/board.php?boardid=576&sid=c3c36e1c4b27c02ee09c2bbe4a5b29cd