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 ('47d897a5a423eadc7d0c2a4ca0dfe650','0','52.14.240.224','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715520423','thread.php?threadid=895&goto=lastpost&sid=32d943d3d9ef8a149e68c6cfbaa203d7','0','0','')
mysql error: Duplicate entry '47d897a5a423eadc7d0c2a4ca0dfe650' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 15:27
Script: /thread.php?threadid=895&goto=lastpost&sid=32d943d3d9ef8a149e68c6cfbaa203d7
Referer: http://wehrbauten.de/thread.php?threadid=895&goto=lastpost&sid=32d943d3d9ef8a149e68c6cfbaa203d7