If two different persons have been squeezed together into one WikiTree profile by mistake, one of them needs a new profile with the correct information.
The other one will probably need to have some of the profile information corrected.
If the two are so easy to mix up, there should be a research note section
explaining the situation.
Which one gets to keep the existing profile is your choice - presumably one would pick the one with the correct parents. All relationships will have to be sorted out, of course.