Why I use Rails model concerns will get the superclass mismatch errors with class in production environment?

I use Puma and Rails 4.2.

My concern is set up like this:

Class Order module Chartable ... end end 

The order class is set up like this:

Class Order include Chartable end 

In development, the code showed no errors, but in the production I got the error:

Unable to load application: TypeError: superclass mismatch for class Order.

I don't know why this error happens, and after consulting some documentation, I think the error comes from Puma's set :puma_preload_app, true - is it right?

How can I fix this error and preload_app always set to true?