I have recently changed the data source of my Tableau Dashboard and have begun the process of changing the Dimensions, Measures and Sets.  I have been able to get rid of all the red exclamation point from within Dimensions and Measures as well as recreate the necessary hierarchies.  I am having trouble with the sets.  Many of the sets have red exclamation points next to them and I am not sure how to step into them to make  the necessary changes.  Any help would be greatly appreciated.  Additionally, do I need to have the same calculated fields as the original dashboard?