SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('3f9c6d16470097acbb9c20db79536747','0','18.190.152.38','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714669333','thread.php?goto=lastpost&threadid=558&sid=f835f6ff5af1a44190073bc76ca6201c','0','0','')
mysql error: Duplicate entry '3f9c6d16470097acbb9c20db79536747' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 19:02
Script: /thread.php?goto=lastpost&threadid=558&sid=f835f6ff5af1a44190073bc76ca6201c
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=558&sid=f835f6ff5af1a44190073bc76ca6201c