lakedistrict
The Hart Crag you mention is already marked on the map (https://www.openstreetmap.org/node/29728747). There is also a Hart Crag here, well just a bit to the south, that is already mapped correctly as an actual crag (https://www.openstreetmap.org/way/53226987). I've deleted this incorrect summit node. (It's common to have multiple places with the same name in the Lake District)