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 ('63ff3594b6caf71ac039fb6840f41711','0','3.140.186.201','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714813064','board.php?boardid=201&sid=030f4d072e0c2ad6f986abdbe174536c','0','0','')
mysql error: Duplicate entry '63ff3594b6caf71ac039fb6840f41711' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 10:57
Script: /board.php?boardid=201&sid=030f4d072e0c2ad6f986abdbe174536c
Referer: http://wehrbauten.de/board.php?boardid=201&sid=030f4d072e0c2ad6f986abdbe174536c