Yeah, that one is definitely pretty tricky. It's possible to lock yourself out of it all the way up to and through the final negotiations. I may put in an alternate way to earn it in Act 2, but it's difficult to find a good place for it that makes sense.
It's nothing too big, though. It'll affect some dialogue during Act 2, and it might change how a future event happens (I don't have that fully planned out yet), but that's pretty much it.