GGC fk relationship selector issue

I have a grid grouping control that allows multiple selections in a column using the foreign keys. When I select the dropdown I am presented with an empty row to add items and a list of all the selected items. When I select the empty row I have a new dropdown showing my all possible selections. However in the top right of this control there is a graphic with a couple of dots and a pencil when this is selected I get yet another dropdown (replaces the last one) which allows you to enter in data. I do not want the user to enter in any manual data this throws an exception (it is caught gracefully) but I would like to prevent this from happening. How can I turn off this option?

Never mind I found it. My ChildRelationsDescriptions ChildRelation needed me to manually set allowxxx = false.