permit field required

app/controllers/api/submissions_controller.rb

@@ -192,7 +192,7 @@ module Api
                         :completed, :phone, :application_key, :external_id, :reply_to, :go_to_last,
                         { metadata: {}, values: {}, roles: [], readonly_fields: [], message: %i[subject body],
                           fields: [:name, :uuid, :default_value, :value, :title, :description,
-                                   :readonly, :validation_pattern, :invalid_message,
+                                   :readonly, :required, :validation_pattern, :invalid_message,
                                    { default_value: [], value: [], preferences: {} }] }]]
         }
       ]