Error connection SQLSTATE[HY000] [1045] only in new forms

Hi, so I tried to add new forms and grids with new tables. The connection and database are still the same.
There is no problem in development environment, but when I tried to deploy to PROD, I got error,

An error occurred while connecting to the database:
Connection attempt failed: SQLSTATE[HY000] [1045] Access denied for user ‘system’@‘ITSOL-900’ (using password: YES)


Anyone has any idea what causes this? The user and password are correct, and it has ALL privileges. And as I said, it’s still the same connection and database with the other forms and grids. But only new ones got this error.

For me the same… Did it fix? How?