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 ('cc3912816bf3936819af457810864d70','0','18.191.108.168','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715556221','board.php?boardid=475&sid=cd695555786bfb2bcd0bb87c0daaf02a','0','0','')
mysql error: Duplicate entry 'cc3912816bf3936819af457810864d70' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 01:23
Script: /board.php?boardid=475&sid=cd695555786bfb2bcd0bb87c0daaf02a
Referer: http://wehrbauten.de/board.php?boardid=475&sid=cd695555786bfb2bcd0bb87c0daaf02a