Hi Melanie,
Welcome back to the Disney Parks Moms Panel and thank you for asking us another question!
From what I understand, all
Special Offers are limited to a certain number of reservations at each Walt Disney World Resort Hotel. If you already reserved your upcoming visit to Walt Disney World Resort, you will have to cancel your reservation and re-book it with a Resort that offers the Special Offer that you’re looking for as promotions are not automatically applied to existing reservations.
You may get lucky and be able to get a package that is identical to the one you had initially booked, but there is a chance that you may not. In that case, you'll have to choose a different room type/Resort if you want to take advantage of the special offer, or you'll have to stick with your original package (and cost).
Please don’t hesitate to come back and see us if you have any other questions about your upcoming vacation.
Have a Magical Day,
Lynne