New (+) button in subgrid defaults to add existing instead of create new

Question

I have a subgrid for an entity,

I want to remove the suggestions that comes when I try to add new entity items to it How can I do it?

Answer 1

If the subgrid is a 1:N relationship, edit the properties of the lookup attribute on the child entity to make it required.

In the case of 1:N relationships, if the lookup attribute on the child entity is a required attribute the Add button will act as the 'Add New...' button. Otherwise, it acts as the 'Add Existing... button.

See here and here for more info (there are many more articles about this issue you can find).