In attempting to complete the Knowledge Graph Module 5 Assessment, I am having some difficulty setting the instructed validation rule for the custom field “Restaurant Promotions” of the newly created custom field type “Promotions”.
The directions say to add a “Max 3 entries” validation rule, however, I cannot seem to add any validation rules for custom fields or field types. I can add validation rules for the sub field labels within the custom field type, but these are not inherited by the parent field type. In fact, in selecting the custom field type for the new custom field, the “field settings” options are removed from the screen entirely, and the default validation rule for field specification “List of Struct” (Item count: Any to 5000) is populated automatically. I have attached a screen shot for reference. I would include more, but I’m limited to one for now.
I’m hoping there’s something I’m missing 
