you are going to end up with two biological males standing on the podium
this is going to force a change.
Female on a birth certificate doesn’t mean you are female. Chromosomes overrule it.
In this case, I think it is going to be simple. XY with a mutation in a different gene causing the issue.
They will still have to figure out how to deal with all the various mutations of XY, like XXXY Caroline Cossey. I think her birth certificate said male.