So! DONT LISTEN TO ANY COMMENT!
I tried every one and it didn’t work!
the only way to solve it like I did is to
1) get an old iPhone and pair the watch to that!
2) straight away then you unpair it from the old
Iphone!
3) then pair it to your current IPhone!
4) then it lets you update the update!
please listen to this as it’s the only way to get it to work!