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 ('3863e103991d45fd81651a877a99f257','0','18.223.170.21','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715860684','thread.php?threadid=7204&sid=b404b1677b1fbf3b85fdfcf81b008cd4','0','0','')
mysql error: Duplicate entry '3863e103991d45fd81651a877a99f257' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 16.05.2024 @ 13:58
Script: /thread.php?threadid=7204&sid=b404b1677b1fbf3b85fdfcf81b008cd4
Referer: