"SHIP TO LOCATION" mandatory

I've made the "SHIP TO LOCATION" field mandatory on an AP invoice using a sandbox, so it's always required. However, when creating an invoice from a spreadsheet, this requirement doesn't apply, and the invoice can still be validated. Is there a way to make it display an error message when validating if this field is empty, or a way to make the field mandatory in the invoice creation spreadsheet?
I created a Service Record (SR), and Oracle told me that sandboxes aren't supported. The SR is 4-0001695634.