When projects are sharing records with one another, it should not be possible to merge records that belong to different projects, since this is destructive to data from the other project. When looking at the "All Places" or "Places from Other Projects" tab, for example, merging should be disabled in the user interface.
When projects are sharing records with one another, it should not be possible to merge records that belong to different projects, since this is destructive to data from the other project. When looking at the "All Places" or "Places from Other Projects" tab, for example, merging should be disabled in the user interface.