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 ('5dfb3889be7ce2c7ec6a60fff16e9fd2','0','52.14.85.76','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715029891','board.php?boardid=250&sid=09a73e35320aa75a9171c67a406ea038','0','0','')
mysql error: Duplicate entry '5dfb3889be7ce2c7ec6a60fff16e9fd2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 23:11
Script: /board.php?boardid=250&sid=09a73e35320aa75a9171c67a406ea038
Referer: http://wehrbauten.de/board.php?boardid=250&sid=09a73e35320aa75a9171c67a406ea038