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 ('996004cf9a8a4390ade55ccaf5ae8409','0','18.118.227.69','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715099332','board.php?boardid=80&sid=71ddb25cceb73f85aece8871b7cdce0a','0','0','')
mysql error: Duplicate entry '996004cf9a8a4390ade55ccaf5ae8409' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 18:28
Script: /board.php?boardid=80&sid=71ddb25cceb73f85aece8871b7cdce0a
Referer: