from zerrenda.settings import *

DEBUG = True

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles'
)

from zerrenda.settings import *

DEBUG = True

Remove duplicate INSTALLED_APPS from settings
Remove duplicate INSTALLED_APPS from settings
