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 ('3e87959f5ca79180138675230b1fa5f2','0','3.21.247.253','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715812970','board.php?boardid=218&sid=11f47c855a99747f428f93351b00db83','0','0','')
mysql error: Duplicate entry '3e87959f5ca79180138675230b1fa5f2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 00:42
Script: /board.php?boardid=218&sid=11f47c855a99747f428f93351b00db83
Referer: