diff --git a/app/models/service_template.rb b/app/models/service_template.rb
index 1c107d829b2..783378d16e5 100644
--- a/app/models/service_template.rb
+++ b/app/models/service_template.rb
@@ -438,7 +438,7 @@ def provision_workflow(user, dialog_options = nil, request_options = {})
   end
 
   def dup
-    super.tap { |obj| obj.update_attributes(:guid => nil) }
+    super.tap { |obj| obj.guid = nil }
   end
 
   def add_resource(rsc, options = {})