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 ('4171d7f434e53e487e2b45f7840bbdfc','0','52.15.160.43','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715665742','thread.php?threadid=21&sid=34aa782d6e2209f0c6cdd2a4edcdd517','0','0','')
mysql error: Duplicate entry '4171d7f434e53e487e2b45f7840bbdfc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 14.05.2024 @ 07:49
Script: /thread.php?threadid=21&sid=34aa782d6e2209f0c6cdd2a4edcdd517
Referer: