I have a BCV booked for April 2023 that I'd like to modify to Aulani. When I try to modify the ressie both Aulani and Grand Cali are dithered out and I can't select them but all other resorts (other than RIV) are available. I don't want to cancel the ressie and book Aulani in case it get's booked by the time I cancel and then try to book. The point are resale but in the right use year and not transferred or anything. Any ideas why those 2 resorts are blocked for modification? TIA