TaxiParking Index Numbers

Is it possible to edit the Index numbers that automatically get created when creating a Parking area?
Or is it possible to sort the parking spots in an orderly way?

I am creating a new airport and had all my parking spots in and all was good. But then I added four more parking spots and now the Index numbers assigned to them are lower than the ones I have and therefore the parking areas now are displayed in the wrong order in the World Map.