First off, you might have her checked by the vet for a urinary tract infection, or something similar. She might be telling you that she really REALLY needs to go out.
Secondly, once you rule out that there is any serious reason why she might have developed this behavior..I would move both crates to a far away part of the house. It is wierd that she developed this at a year old. Usually you see this in puppies as they are getting used to the change from litter to new home.
Thirdly, if nothing else fixes it, I would let both dogs sleep in bed You could do a compromise. When she wakes up, before she starts screaming...take her out of her crate, and either take her outside for a potty, or just let the dogs in bed for that last hour or two of the morning! That has got to be less disruptive than screaming for an hour, no?