I want to know the answer to the following question:
Which processes simply alter the consent given by parties to a previously valid treaty rather than invalidating the consent completely?
All the background I'm provided with is that "Invalidation is separate from withdrawal, suspension, or termination (addressed above), which all involve an alteration in the consent of the parties of a previously valid treaty rather than the invalidation of that consent in the first place.". Is that enough to answer the question?