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 ('7668b4e3c69f26ed27e313e01a5629cd','0','18.117.107.90','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714883229','board.php?boardid=40&sid=c9bcbef75eac8b10539ed2e1d53ecfd5','0','0','')
mysql error: Duplicate entry '7668b4e3c69f26ed27e313e01a5629cd' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 06:27
Script: /board.php?boardid=40&sid=c9bcbef75eac8b10539ed2e1d53ecfd5
Referer: http://wehrbauten.de/board.php?boardid=40&sid=c9bcbef75eac8b10539ed2e1d53ecfd5