Relationship Class in ArcGIS Pro can't add records to related table

JamieLeitch1

I imported a feature layer from AGOL and imported it into my ArcGIS Pro project geodatabase as a new feature class called Street_Lights.  I then created a new table called Street_Lights_Inspections with a field called ParentGuid of type Guid, a date, and a comments field.  I created a one to many relationship class from Street_Lights to Street_Lights_Inspections using the GlobalID in Street_Lights to the ParentGuid in Street_Lights_Inspections.  I'd like to be able to add many inspection records to the Street_Lights_Inspections table for each Street Light.  When I select a street light point on the map, and click the Attributes tab, I can see that there is a related table as below:

Now I want to add a record to Street_Lights_Inspections.  When I right-click on Street_Lights_Inspections the "Add new to relationship" option is greyed out. What could I be doing wrong?

I'm using ArcGIS Pro 2.1.2 Advanced

JamieLeitch1

I got this from Support and it worked for me:

1. In the Catalog window:
   a.  Right-click the FGDB -> Refresh
2. In the Contents window:
   a. Remove the Street_Lights layer and Street_Lights_Inspections table from the map
   b. Add these back to the map by dragging them from the Catalog
   c. Now try 'Add New To Relationship' through the Attributes window.