Linking fields are not required to be in the view. You can link/unlink fields between data sources by clicking on the link icon from the view of the secondary data source. This allows linking at a different level than the view.
I hope this helps.
Please remember to mark this or any other reply that is helpful or solves your issue with the 'Correct Answer' and/or 'This Helped Me' links below.
Normally the linking fields do not have to be in the view, but I think that you are overlooking the fact that I have an LOD calculation. when I remove the linking fields from the view, that specific calculation breaks and the pill turns red.