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 ('427adb1991727766b585ca1ec636723e','0','3.144.222.208','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716239273','thread.php?postid=50897&sid=e94affc295055617a4e2ac81892af730','0','0','')
mysql error: Duplicate entry '427adb1991727766b585ca1ec636723e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 20.05.2024 @ 23:07
Script: /thread.php?postid=50897&sid=e94affc295055617a4e2ac81892af730
Referer: http://vksvg.de/thread.php?threadid=4163&goto=lastpost&sid=31567c7ca88a873dcba9890332e677fe