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 ('6aec5dd874ed36997f45a057627e5b50','0','3.129.210.17','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715069776','board.php?boardid=38&sid=3cb56787aa4c3c0d7bae70874c7bbfc7','0','0','')
mysql error: Duplicate entry '6aec5dd874ed36997f45a057627e5b50' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 10:16
Script: /board.php?boardid=38&sid=3cb56787aa4c3c0d7bae70874c7bbfc7
Referer: http://wehrbauten.de/board.php?boardid=38&sid=3cb56787aa4c3c0d7bae70874c7bbfc7