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: 5.6.40-65+0~20230214.72+debian11~1.gbp473a1b
Date: 28.09.2023 @ 12:46
Script: /main/thread.php?threadid=1223&sid=a00c43f1d7b28c802be69f81a5f5cf41
Referer: