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 ('9b18be12f0ed03a2eee871e64bc9a356','0','3.137.178.133','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714977405','jgs_portal.php?sid=d6f7a398ad8b5cfba4df5f68817c0e8e','0','0','')
mysql error: Duplicate entry '9b18be12f0ed03a2eee871e64bc9a356' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 08:36
Script: /jgs_portal.php?sid=d6f7a398ad8b5cfba4df5f68817c0e8e
Referer: http://wehrbauten.de/jgs_portal.php?sid=d6f7a398ad8b5cfba4df5f68817c0e8e