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 ('c97c48a452317b3a39236003b1497c5d','0','3.21.233.41','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714972023','thread.php?goto=lastpost&threadid=563&sid=00ece9b2c97eb4fc439c928ad2bf5638','0','0','')
mysql error: Duplicate entry 'c97c48a452317b3a39236003b1497c5d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 07:07
Script: /thread.php?goto=lastpost&threadid=563&sid=00ece9b2c97eb4fc439c928ad2bf5638
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=563&sid=00ece9b2c97eb4fc439c928ad2bf5638