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 ('cfc56c98f900ff2836253650f7625871','0','3.21.43.192','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715584023','memberslist.php?sid=b1d0506fdcb35ca27c8a47e808205b5d','0','0','')
mysql error: Duplicate entry 'cfc56c98f900ff2836253650f7625871' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 09:07
Script: /memberslist.php?sid=b1d0506fdcb35ca27c8a47e808205b5d
Referer: http://wehrbauten.de/memberslist.php?sid=b1d0506fdcb35ca27c8a47e808205b5d