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 ('047f028733e4d989d7cdcccb958f56f5','0','18.221.165.246','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714653279','thread.php?goto=lastpost&threadid=571&sid=65a5939eaa1e5000064724676b6706d6','0','0','')
mysql error: Duplicate entry '047f028733e4d989d7cdcccb958f56f5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 14:34
Script: /thread.php?goto=lastpost&threadid=571&sid=65a5939eaa1e5000064724676b6706d6
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=571&sid=65a5939eaa1e5000064724676b6706d6