If a reservation is moved to a room which is already booked, a special warning is shown with the possibility to switch the rooms for the two reservations. Here the "used as" is kept for both reservations. The label “msg3box87” activates the new feature. The icon can be configured (1=blue question mark, 2=red stop icon). The user has a choice to switch the rooms or to move the selected room, only.
Note that this function does include the "Move Rooms - Check Roomtype" logic (V2.15).