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 ('261def969ab821395170331b38274c5a','0','216.73.216.25','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1750415882','addreply.php?action=quote&postid=35195','0','0','')
mysql error: Duplicate entry '261def969ab821395170331b38274c5a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 20.06.2025 @ 12:38
Script: /addreply.php?action=quote&postid=35195
Referer: