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 ('b9cfe5a833a7dee6b72418b773ef906e','0','3.137.174.52','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1745064465','addreply.php?action=quote&postid=5327','0','0','')
mysql error: Duplicate entry 'b9cfe5a833a7dee6b72418b773ef906e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 19.04.2025 @ 14:07
Script: /addreply.php?action=quote&postid=5327
Referer: http://gttempel.de/addreply.php?action=quote&postid=5327