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 ('508ecedd86decf0e5448ff30e99ee106','0','18.191.240.222','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716119812','register.php?sid=ce65c7abe73142c474d6950f60677e3a','0','0','')
mysql error: Duplicate entry '508ecedd86decf0e5448ff30e99ee106' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 19.05.2024 @ 13:56
Script: /board/register.php?sid=ce65c7abe73142c474d6950f60677e3a
Referer: