I'm unable to add a person from my GEDCOM because GEDCOMpare is trying to add her as the mother of a public profile that I don't manage. I'd previously added the person's husband, but GEDCOMpare won't add her as that person's wife because her child's already in WikiTree..
I suspect the workaround for now is to go through GEDCOMpare and find where I've matched the child in my GEDCOM to the public profile, unmatch them, and then re-add the mother. (Or if I don't mind waiting a few days, since the profile manager's been responsive in the past, I can put in a trusted list request and try again later.)