The 10.1 class has some special rules, and one of them is that each vehicle must be allocated to a separate class 10.1. So, if you sell a class 10.1 vehicle, that class closes, and a new one opens up if you buy a new class 10.1 car.
Also unique to class 10.1 is that when you close the class, there is no recapture or terminal loss. But you may be able to claim 50% of the CCA that would be allowed if you had still owned the car at the end of the year.
This Canada Revenue Agency (CRA) page has more information on Class 10.1: Part B - Class 10.1
