Hello there, Ryan! Welcome to planDisney. We are thrilled to hear that you have a visit to Disneyland Resort coming up very soon, so let's get your question answered.
You are correct that to enter either park at Disneyland Resort, you must have both a valid theme park ticket and a theme park ticket reservation. The error that you are getting means that you actually already have a theme park ticket reservation for that ticket. If you purchased your ticket through the Disneyland website or the
Disneyland app, you select the day and park, which means your theme park ticket reservation is made once your ticket is purchased. This sounds like you are good to go!
To double-check your reservation you can head to the
Ticket and Reservation Details page on the Disneyland website and click "View My Park Reservations". This will take you to a new page that will show you all upcoming reservations for any and all tickets that you have linked to your Disney account.
Even though you will be visiting the park after Christmas, there is still plenty to celebrate at Disneyland Resort and you'll be able to enjoy all of the holiday offerings. Be sure to bring your appetite so that you can enjoy all the delicious bites and drinks from the marketplace kiosks that are part of the
Disney Festival of Holidays.
Ryan, thanks again for stopping by planDisney. I hope you have a fabulous time kicking off the new year at Disney California Adventure Park. May your new year be full of magic!
Carrie