price, a sku, and a attribute_values_id field. The attribute_values_id is a select field with a BelongsToMany relationship between ProductSku and AttributeValue. This all works great, but I set the attribute_values_id from an attribute_id field outside of the repeater, meaning that I build all the necessary repeater items for a product, based on the selected attribute_id. attribute_values_id select field to store data in the pivot table between ProductSku and AttributeValue, and to set the ItemLabel, this field just causes the product creation process to be less intuitive. So I need to find a way to keep the existing functionality, without showing the attribute_values_id select field.->hidden() to the select field, no pivot table data is stored in the database when I submit the form.Forms\Components\Hidden::make('attribute_values_id'),, and then use a ->mutateRelationshipDataBeforeCreateUsing() to somehow establish the BelongsToMany relationship, but I am not sure I can set relationship data for a ProductSku model that is not yet created.