Not to rehash the previous discussion of Commander Leia and whether a matching command token can stack or not...
I have a separate question:
Let's say I have a GR-75 with a nav token on it. The next command it reveals is a squadron command. With Leia's ability, the GR-75 can now activate 3 squads. If the GR-75 decides to do this, does it have to discard the nav token it has banked from a previous round since it can only hold one command token and you activated a third squadron as if you had a squadron token?