old_contents: from django.apps import AppConfig
  
  
  class LayoutConfig(AppConfig):
      label = 'page'
      name = 'page'
  
new_contents: from django.apps import AppConfig
  
  
  class LayoutConfig(AppConfig):
      label = 'page'
      name = 'icekit.page_types.layout_page'
      verbose_name = 'Page'
  
subject: Update app config.