NameError in Admin::Users#show

uninitialized constant AvatarAttachmentDashboard

require "administrate/base_dashboard"

class UserDashboard < Administrate::BaseDashboard

  ATTRIBUTE_TYPES = {
    id: Field::Number,
    ...
    # avatar_attachment: Field::HasOne, # <============= COMMENT THIS OUT
    # avatar_blob: Field::HasOne, # <=================== COMMENT THIS OUT
    ...
  }.freeze

  # SHOW_PAGE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's show page.
  SHOW_PAGE_ATTRIBUTES = [
    :id,
    ...
    # :avatar_attachment, # <======================== COMMENT THIS OUT
    # :avatar_blob, # <============================== COMMENT THIS OUT
    ...
  ].freeze

end