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 ('d51006b9cd54bcc2dbe9a6f67f8bbf0e','0','18.191.181.231','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714054868','board.php?boardid=68&sid=f643709b1a63f103cebbba84bc10635d','0','0','')
mysql error: Duplicate entry 'd51006b9cd54bcc2dbe9a6f67f8bbf0e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 25.04.2024 @ 16:21
Script: /board.php?boardid=68&sid=f643709b1a63f103cebbba84bc10635d
Referer: