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 ('bb35535bd8fb40266207c0d21c52e8c3','0','18.221.112.220','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715474762','board.php?boardid=146&sid=70027e9de25eddf9527e5c535ae4c38a','0','0','')
mysql error: Duplicate entry 'bb35535bd8fb40266207c0d21c52e8c3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 02:46
Script: /board.php?boardid=146&sid=70027e9de25eddf9527e5c535ae4c38a
Referer: http://wehrbauten.de/board.php?boardid=146&sid=70027e9de25eddf9527e5c535ae4c38a