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 ('b1faacc8291d7f44650ffe4c9db5fbe0','0','3.137.164.241','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714575936','thread.php?postid=90998','0','0','')
mysql error: Duplicate entry 'b1faacc8291d7f44650ffe4c9db5fbe0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.33-0ubuntu0.16.04.1
php version: 5.6.40
Date: 01.05.2024 @ 17:05
Script: /thread.php?postid=90998
Referer: