Shut down a smart radiator

Dear all, I have an issue to ask. In my living I have installed 3 TRVs and a wireless sensor that control them. During Christmas I want to simply turn off one of the trv, near the Christmas tree, but the other two trv to continue the schedule, as usual. Do you have any idea how to do it, and not to be a mechanical action on the radiator? From the app i can't shut down only one of them; only the entire room.