Related Tables in Collector: Spoke to Jeff Shaner and others at ESRI Conference 2018 and it was suggested that I use the Global ID field as the Primary key when joining a stand alone table with point feature class in map service published for Collector. Is this when the Global ID field is established? My table does not have a global id field. I have another field that I proposed to use that is in both the table and the feature class attributes. Why Global ID is suggested to use? Do I need to create a relationship between the table and the feature in the geodatabase for the table to appear in Collector?