Yes it can.
That said: You have to trade two followers against one, if possible, so its not a real "Undonement" (is there a word for that?), because you dont completly restore the board to the old position.
Unless both provinces only had 1 follower. In that case, the 2 vs. 1 would literally undo the previous 1 vs. 1. And that would be permitted, right?