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 ('502b9a6feb26aa0fd33bf8bfe38eb600','0','3.145.166.7','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714987201','board.php?boardid=96&sid=ab0807fc540408a880a73943ec783b42','0','0','')
mysql error: Duplicate entry '502b9a6feb26aa0fd33bf8bfe38eb600' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 11:20
Script: /board.php?boardid=96&sid=ab0807fc540408a880a73943ec783b42
Referer: http://wehrbauten.de/board.php?boardid=96&sid=ab0807fc540408a880a73943ec783b42