Fix relations error in tags

app/controllers/admin/tags_controller.rb

@@ -19,7 +19,7 @@ class Admin::TagsController < ApplicationController
   end
 
   def create
-    @tag = Tag.create(params[:tag])
+    @tag = (params[:tag][:module_app_id].blank? ? Tag.create(params[:tag]) : ModuleAppTag.create(params[:tag]))
   end
 
   def update