old_contents: from django.contrib import admin
  from smart_manager.models import SmartManager
  
  
  class SmartManagerAdmin(admin.ModelAdmin):
      fields = ('name', 'smart_manager_class', 'primary_obj_type', 'primary_obj_id')
  
  
  admin.site.register(SmartManager, SmartManagerAdmin)
  
new_contents: from django.contrib import admin
  from smart_manager.models import SmartManager
  
  
  class SmartManagerAdmin(admin.ModelAdmin):
      list_display = ('name', 'smart_manager_class', 'primary_obj_type', 'primary_obj_id')
  
  
  admin.site.register(SmartManager, SmartManagerAdmin)
  
subject: Update admin.py