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 ('84344bb0c3542762b32d75ae5d38ba28','0','3.21.162.87','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714614849','board.php?boardid=239&sid=cbee938139c9d987e3e9ae5d80c1bce5','0','0','')
mysql error: Duplicate entry '84344bb0c3542762b32d75ae5d38ba28' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 03:54
Script: /board.php?boardid=239&sid=cbee938139c9d987e3e9ae5d80c1bce5
Referer: