SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('87f0e778fefa4d2b98b9580e96f2b61f','0','216.73.216.235','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1749288149','thread.php?postid=35471','0','0','')
mysql error: Duplicate entry '87f0e778fefa4d2b98b9580e96f2b61f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 07.06.2025 @ 11:22
Script: /thread.php?postid=35471
Referer: