SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Access denied for user 'web6'@'localhost' (using password: YES)
mysql error number: 1045
mysql version: unknown
php version: 5.6.40-68+0~20230902.80+debian11~1.gbpa2012b
Date: 18.04.2024 @ 16:06
Script: /main/thread.php?goto=firstnew_thread&threadid=1010&sid=d0bc7457a27a7ad78ed20e01d1fc69d4
Referer: