You may need to add a new database table when adding a new data source.
Adding tables to the entity database does not allow resolution on the new data, it is just a place to store data.
It is recommended that you should use a test database when verifying new configurations before applying those new configurations to your production environment.
It is recommended to use existing tables and fields to classify new data if at all possible.
Adding a new table will accommodate expected data that is not yet configured in the system. You should create the new database table to be consistent with your current data model.