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 ('ef2a868d127f4dbe7462a80a1dc815ab','0','3.142.198.129','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)','1714205400','thread.php?threadid=10290&threadview=0&hilight=&hilightuser=0&sid=395e1a16afb0675fd4583240b40d3a77&page=2','0','0','')
mysql error: Duplicate entry 'ef2a868d127f4dbe7462a80a1dc815ab' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.23-MariaDB-0+deb11u1-log
php version: 5.6.40
Date: 27.04.2024 @ 10:10
Script: /thread.php?threadid=10290&threadview=0&hilight=&hilightuser=0&sid=395e1a16afb0675fd4583240b40d3a77&page=2
Referer: