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 ('a6f8d9dd75d5138dddbae336ce5645b9','0','3.141.47.221','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714585477','board.php?boardid=227&sid=20b3a2de4c6064fc0f355d3787baa0b1','0','0','')
mysql error: Duplicate entry 'a6f8d9dd75d5138dddbae336ce5645b9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 01.05.2024 @ 19:44
Script: /board.php?boardid=227&sid=20b3a2de4c6064fc0f355d3787baa0b1
Referer: