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 ('cfc0dddd5dae08f6351985881c3ff20f','0','3.144.143.31','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714618701','board.php?boardid=708&sid=47a4f7c6539c59ab5805333d06ded6e1','0','0','')
mysql error: Duplicate entry 'cfc0dddd5dae08f6351985881c3ff20f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 04:58
Script: /board.php?boardid=708&sid=47a4f7c6539c59ab5805333d06ded6e1
Referer: http://wehrbauten.de/board.php?boardid=708&sid=47a4f7c6539c59ab5805333d06ded6e1