For databases, it's better to stick with the values available for the fields you want to add. However, before you try to add something to the database, use the software and check the connection. Most likely, this is the problem that prevents you from adding data to the database, even if you have it opened from a previous session. This way it should work. Additionally, check the fields to accept the data you need. This can be checked in the database structure for the application you're using as the back-end.