Form 1098

I sold my home residence and purchased a new one in August 2021. I received two 1098 forms, one from the new mortgage company and one from the old mortgage company. When I input the $0 in Box 2, Outstanding Mortgage Principal, for the mortgage of the residence I sold, I'm given an error message, "Outstanding Mortgage Principle Must Have a Value".

 

Does anyone know why and/or what needs to be done to correct it?

 

Thank you!