Cars - Ford Mustang GT '24 Not Considered a Mustang Body

Bug Info: 2024 Ford Mustang GT not classified as a Mustang body.
Platform: Series X
Edition: Game Pass, Premium, Add-Ons
Account: solo account

It’s supposed to be a Mustang body, but the game won’t accept it, and let me use it for the seasonals on The Rally Adventure map. Seasonal ending 5/22/2024.