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 ('d6251387b8ac0ee9a8d4c3f7202b4f48','0','18.118.82.92','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1745169460','thread.php?goto=firstnew_thread&threadid=1535','0','0','')
mysql error: Duplicate entry 'd6251387b8ac0ee9a8d4c3f7202b4f48' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 20.04.2025 @ 19:17
Script: /thread.php?goto=firstnew_thread&threadid=1535
Referer: http://gttempel.de/thread.php?goto=firstnew_thread&threadid=1535