Hi Allison, thanks for stopping by planDisney with your question.
You can only have one
park reservation per day of your ticket at a time. To change a reservation, you must first cancel the reservation associated to the ticket, then make a new reservation.
If you’re ready to cancel your reservation, here is how you’ll do it:
~
Log in to your Disneyland account and go to My Disneyland, Ticket and Reservation Details, View My Park Reservations
~ You should see a cancellation link next to the reservation
Your ticket will remain associated to your account so you can
make a new reservation once you are ready.
I hope this helps. If you need more help, you could contact a Cast Member on the
Ticket Services team via phone or through the “Chat with Us” feature in the
Disneyland mobile app.
See ya real soon,
Kamini