? Booking rooms with AP

[tkldisney]

I just got my first AP. I already have a ressie with AAA rate for upcoming trip in Nov. If they come out with AP rate during that time frame, do you make a new ressie, then cancel the one you have or when u call in do you give them resort ressie info and they just update with AP? If they do come out with AP rate just want to do what is easiest & quickest.