Specifically, as a GM, do you adjust the difficulty of Force Power checks made on an ally? I ask because as far as I recall, the rules state that Force Power checks on Player Characters must always be Opposed checks. I've run into the situation where the group's Force User is trying to heal an ally but fails on the Discipline check against their ally, when both players wanted the healing to happen.
So do you adjust the difficulty if both players agree about the power taking place? If so, why?
Do you choose not to adjust the difficulty and leave things as the rules state? Why exactly?