How do people handle "license has expired"?

[Ayitaka]

I am curious as to how people handle instances where you receive an email informing you that an Org license has expired, before it is even due to expire.

There are times when some change causes licenses to prematurely become invalid. After we apply whatever fix is required to resolve the initial change that caused them to be invalid, we can just regenerate the licenses. But I am curious, at that point, is there some way to return existing licenses to a valid state?