why can i delete an adress from my microsoft account adress book

i have tryied adding a new adress and everithing i just cand delet an older adress sayng that:

This address is being used for purchases or subscriptions. If you want to change or remove it, add a new address and set it as your preferred billing address.

i already tried setting a new adress and it just keep reversing to that old one... what can i do?

please help

:)