If there is an attribute that is required for your category, but does not apply to the products in your group, set the attribute value as the same for each product in the group. Choose the most ambiguous of the choices (such as "Uncategorized").

Setting the attributes value as the same for all products in a group will not prompt the attribute to create a traits drop-down menu on the deal page.

If you feel that this is an unnecessary or inappropriate attribute for the category, submit a Taxonomy Request that it be non-required.