SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): cannot use database mastero_master
mysql error: Access denied for user 'mastero_master'@'localhost' to database 'mastero_master'
mysql error number: 1044
mysql version: 5.7.26
php version: 5.6.40
Date: 25.05.2019 @ 05:00
Script: /wbb2/hmportal.php
Referer: