Application labels aren't unique, duplicates: %s 1: initialize app configs and import app modules. for entry in installed_apps: if isinstance (entry, AppConfig): app_config = entry else: app_config = AppConfig.create (entry) if app_config.label in self.app_configs: raise ImproperlyConfigured ( "Application labels aren't unique, " "duplicates: %s" % app_config.label) self.app_configs [app ...