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 ('1ffc99529d07175ee0cfb4f6b643ca87','0','3.21.93.44','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714427066','thread.php?goto=lastpost&threadid=8113&sid=4f9260a9f101a5371cf8dcfb363471d0','0','0','')
mysql error: Duplicate entry '1ffc99529d07175ee0cfb4f6b643ca87' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 29.04.2024 @ 23:44
Script: /thread.php?goto=lastpost&threadid=8113&sid=4f9260a9f101a5371cf8dcfb363471d0
Referer: