Legal precedents are what they are, old contracts are still contracts yes?
There’s plenty of blame to our ancestral congressmen for even writing these up. Playing nice was not a very good way of assimilating the native population as most every conquering nation usually never did throughout history. But obviously assimilating a native population of practically opposite cultured people that didn’t speak your language, and was pretty heck bent on warfare, well, there’s that….
Really tough way forward, I suspect much more butthurt to come on this matter in the next several years unless potus changes parties, even then theirs a myriad of international crapshow items to address