Debatable. I would actually keep a save before you even receive the potion if possible, just to be sure.
I have 756 seprate saves... dont worry about that.
What im worrying about is, if Beth fix it and then go "K. Its fixed but only if you have not yet recieved the potion" and im already 20 hours plus ahead of when i recieved the potion.. everything ive done and got from that point will be gone and have to be done again..