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 ('7caf8b6b9ed93839d30a6016227b47c0','0','3.17.203.68','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)','1714290183','thread.php?threadid=14155&sid=ca60a138a4537b293cad4f6cb0b46bf3','0','0','')
mysql error: Duplicate entry '7caf8b6b9ed93839d30a6016227b47c0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.23-MariaDB-0+deb11u1-log
php version: 5.6.40
Date: 28.04.2024 @ 09:43
Script: /thread.php?threadid=14155&sid=ca60a138a4537b293cad4f6cb0b46bf3
Referer: http://www.hoerspiel-paradies.de/thread.php?threadid=14155&sid=ca60a138a4537b293cad4f6cb0b46bf3