I'm opening an existing 1040 client return proforma'd from the 2020 software and get a pop up message titled "Restore missing data", text that says "The following input did not proforma correctly from the previous year. Do you want to restore data to the current year?" and a drop-down of "ClientInfo" and sub-items of "Spouse ID Type" and TaxPayer ID Type".  Options are "Yes, Restore", "Remind me next time", and "Keep it the way it is".  I don't understand what I'd be restoring so have only hit "Remind me next time". 

What does this message mean and what happens if I choose "Yes, Restore"?