old_contents: from django.contrib import admin
  
  from pages.models import CustomPage, ModelPage, FlatPage
  
  
  class PageAdmin(admin.ModelAdmin):
      fields = ['title', 'slug', '_parent', 'is_active', 'position',
                '_h1', 'keywords', 'description', 'content', 'seo_text']
      list_display = ['id', 'title', 'slug']
      list_display_links = ['title']
      search_fields = ['title', 'slug']
  
new_contents: from django.contrib import admin
  
  from pages.models import CustomPage, ModelPage, FlatPage
  
  
  class PageAdmin(admin.ModelAdmin):
      fields = ['_title', 'slug', '_parent', 'is_active', 'position',
                'h1', 'keywords', 'description', 'content', 'seo_text']
      list_display = ['id', '_title', 'slug']
      list_display_links = ['_title']
      search_fields = ['_title', 'slug']
  
subject: Fix admin bug