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 ('ef38f8b1e97e94dafb8844d664efec1f','0','18.191.200.35','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715913034','jgs_portal.php?sid=9af3d5cc7131f2b0622954720e262b20','0','0','')
mysql error: Duplicate entry 'ef38f8b1e97e94dafb8844d664efec1f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 17.05.2024 @ 04:30
Script: /jgs_portal.php?sid=9af3d5cc7131f2b0622954720e262b20
Referer: http://wehrbauten.de/jgs_portal.php?sid=9af3d5cc7131f2b0622954720e262b20