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 ('ba4b187e94f27a69f22bd2ff8f0a309d','0','18.221.47.203','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716128755','register.php?sid=4c4b96a67c608e8d53541f46f876231d','0','0','')
mysql error: Duplicate entry 'ba4b187e94f27a69f22bd2ff8f0a309d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 19.05.2024 @ 16:25
Script: /board/register.php?sid=4c4b96a67c608e8d53541f46f876231d
Referer: