Parties can withdraw from a treaty. There's such a thing as state sovereignty. :) They can withdraw based on treaty itself or based on law of treaties (art 42)

Parties can withdraw from a treaty. There's such a thing as state sovereignty. :) They can withdraw based on treaty itself or based on law of treaties (art 42) What happens then of course only depends on what the sovereigns will want to do... In this case I'd presume it would not mean restarting WW2 after zillion years have passed. :-)))