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 ('cc3ef2de3599a0c457f9d0f3d9efd1fe','0','3.135.191.134','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715821904','register.php?sid=851aa3cd5705fdac59f591f271148df9','0','0','')
mysql error: Duplicate entry 'cc3ef2de3599a0c457f9d0f3d9efd1fe' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 03:11
Script: /register.php?sid=851aa3cd5705fdac59f591f271148df9
Referer: