If I have more than 1 product brick on a page, the first 1 is always compulsory. eg if I have form with product brick 1 (collection of books) product brick 2 (collection of subscriptions) product brick 3 (collection of other items/subscriptions) then product brick 1 is compulsory and users are forced to choose an item from this group in order to proceed. Yes, I have all bricks set to be checkboxes. Can we disable the compulory setings on the first brick?