Turns out Sir Arthur Conan Doyle, the world renowned author and creator of Sherlock Homes, has a lower numbered duplicate waiting to merge into. However, there's PPP on Doyle-1796, so the merge can't be completed. When the merge is done, the cleanup should include adding the PPP to Doyle-75, the lower numbered profile to be merged into. It would be much appreciated!
I'm presuming the profile is protected by Notables, but I don't really know. Could be some entirely different project. There's an item for the Suggestion Box: PPP could say which project is protecting a profile.