You have probably reviewed the Research Notes section on Unknown-485195, where it states that there is no documentation for the name of Mary Causine. Since Unknown-485195 is PPP, the merge can only be done into that profile unless the Project removes it before the merge. The project may be waiting for the other PM to see if he can provide some 'reliable sources' since those that are on the other profile are not valid for Pre-1700 profiles. If nothing is provided, I am sure the project will re-propose the merge into the Unknown profile.
A new comment was left by Liz on the Causine-12, so hopefully, the PM will respond.