SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('68c5a29d2b1c07db7e6021c4733ca56c','0','18.221.142.39','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1744883072','board.php?boardid=39','0','0','')
mysql error: Duplicate entry '68c5a29d2b1c07db7e6021c4733ca56c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 17.04.2025 @ 11:44
Script: /board.php?boardid=39
Referer: http://www.gttempel.de/markread.php?boardid=39