How you could ever stumble into that conclusion based on anything I've posted is beyond me. You must be hearing voices. Again.
What I'm saying is that Congress does more than admit states, it creates them. Alabama did not exist before the other states allowed it to through a vote in Congress. Ohio was just a figment of the people's imagination until Congress admitted it as a state. Since states are created by Congress and since any post-admission change to their status - splitting, combining, changing their border by a fraction of an inch - has to be approved by Congress, then how you all can come to the conclusion that the approval of the other states is not needed before leaving is something that never ceases to amaze me.
If it didn't exist, how was it admitted?