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 ('c9cd04d9b0591e641e234d77f1147742','0','3.15.156.140','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714656566','thread.php?goto=lastpost&threadid=2427&sid=7f03364568eb72b5847e0a16d9689279','0','0','')
mysql error: Duplicate entry 'c9cd04d9b0591e641e234d77f1147742' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 15:29
Script: /thread.php?goto=lastpost&threadid=2427&sid=7f03364568eb72b5847e0a16d9689279
Referer: