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 ('23acb2fa866a2fb0efc49fe3c59a27ef','0','18.219.165.19','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1744860763','thread.php?goto=lastpost&threadid=1620','0','0','')
mysql error: Duplicate entry '23acb2fa866a2fb0efc49fe3c59a27ef' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 17.04.2025 @ 05:32
Script: /thread.php?goto=lastpost&threadid=1620
Referer: http://gttempel.de/thread.php?goto=lastpost&threadid=1620