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 ('3986325e9676c213c94b7af9f3c23607','0','18.191.135.224','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714955576','thread.php?goto=lastpost&threadid=2175&sid=44a9c89533a458fe1f4eea3af6d3004a','0','0','')
mysql error: Duplicate entry '3986325e9676c213c94b7af9f3c23607' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 02:32
Script: /thread.php?goto=lastpost&threadid=2175&sid=44a9c89533a458fe1f4eea3af6d3004a
Referer: http://wehrbauten.de/thread.php?goto=lastpost&threadid=2175&sid=44a9c89533a458fe1f4eea3af6d3004a