For the quest Restless Dead, the main crypt with the wights is called Scarfell Depths and has a quest marker like it should. However, there’s also a dungeon later on in Bitter Wind Pass called Scarstone Depths that also has a quest icon for Restless Dead.
The quest marker for Scarstone Depths appears to be accidental - if it is, it should probably be removed from poi_areah_scarstonedepths_entrance.dbr