```ruby
require 'carrierwave'

module Gamification::Concerns::Models::Medal
  extend ActiveSupport::Concern

  included do
    belongs_to :goal

    mount_uploader :image, ImageUploader
  end
end
```

Fix a bug that caused ImageUploader to clash
user
```ruby
require 'carrierwave'

module Gamification
  module Concerns::Models::Medal
    extend ActiveSupport::Concern

    included do
      belongs_to :goal

      mount_uploader :image, ImageUploader
    end
  end
end
```
assistant