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 ('43e16fec746c8b67c63ff17e53a470d7','0','3.135.247.188','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715565235','thread.php?goto=lastpost&threadid=2504&sid=2ddfe664880e6982300989837acba3f9','0','0','')
mysql error: Duplicate entry '43e16fec746c8b67c63ff17e53a470d7' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 03:53
Script: /thread.php?goto=lastpost&threadid=2504&sid=2ddfe664880e6982300989837acba3f9
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=2504&sid=2ddfe664880e6982300989837acba3f9