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 ('56d46ff660abee69de3d710e4da8cf49','0','18.188.66.13','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715035201','thread.php?goto=lastpost&threadid=1251','0','0','')
mysql error: Duplicate entry '56d46ff660abee69de3d710e4da8cf49' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 07.05.2024 @ 00:40
Script: /thread.php?goto=lastpost&threadid=1251
Referer: http://www.gttempel.de/thread.php?goto=firstnew_thread&threadid=1251