Welcome to the world of government, where rules do, in fact, change all the time as a result of these nifty things called "laws."
Governments here are constrained in what laws they can pass only by the Constitution and by votes.
CRT has raised constitutional challenges to the Senate merger bill. Therefore, if it's unconstitutional to temporarily merge the Senate and House, our Supreme Court (Scar) will let us know.
It's a wonderful question! This is a good Supreme Court case!