fixed conflict

app/models/menu_item_attribute.rb

@@ -1,4 +1,6 @@
 class MenuItemAttribute < ApplicationRecord
   validates_presence_of :attribute_type, :name, :value
-  
+  def self.collection
+    MenuItemAttribute.select("id, name").map { |e| [e.name, e.id] }
+  end
 end