SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('4bbbe5e222e6ea8ca51ff1600b5f56b2','0','18.223.24.92','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715713445','formmail.php?threadid=1985','0','0','')
mysql error: Duplicate entry '4bbbe5e222e6ea8ca51ff1600b5f56b2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 14.05.2024 @ 21:04
Script: /formmail.php?threadid=1985
Referer: http://gttempel.de/formmail.php?threadid=1985