Opinions on what would be ruled for Texas legally having pre approval to split into multiple states per its Joint Resolution?

This is a pretty contentious topic that I have seen discussed a few times. I'm from Texas and succession is brought up now and then. Lots of people say one thing and lots of people say the other. I am of the belief that Texas does. This is based around the legislature annexing Texas having a clause saying;

"New States, of convenient size, not exceeding four in number, in addition to said State of Texas, and having sufficient population, may hereafter, by the consent of said State, be formed out of the territory thereof, which shall be entitled to admission under the provisions of the federal constitution."

This has been challenged by further clauses in the document. In addition, the actual resolution was called into question after the civil war. However, most of the legislature I look at and court cases seem to support the continued validity of the document.

Because the Resolution was already approved by congress and the senate I feel as though it's a grey area. Even if this did happen it would definitely be challenged by the Supreme Court.

I wonder what others think about this.

Wikipedia article covering- https://en.m.wikipedia.org/wiki/Texas_divisionism