Blue "Add" Button Only Available When Feature DOESN'T Have an Inspection/Related Record..

[ArmstKP]

I have a number of hosted feature layers that were published from ArcGIS Pro 2.8, with relationships.

One of these layers, when trying to add an inspection in Field Maps, will only show the blue "Add" button when the feature DOES NOT already have an inspection.  If it already has an inspection, it does not show the blue "Add" button....  Any clue / ideas?

Blue "Add" Button:

[DougBrowning · Accepted solution]

I have seen this when the relationship class is set to 1:1 instead of 1:M.  In a 1:1 a second add is stopped on purpose.  Take a look at that.  Hope it helps

[ArmstKP]

You nailed it.  The relationship was created as a 1:1 when is should have been 1:M.  I appreciate your input!