new_contents: from django.core.management.base import BaseCommand
  from django.db.models import F
  from forms.models import sheet_models
  
  class Command(BaseCommand):
      def handle(self, *args, **options):
          for name, model in sheet_models.iteritems():
              country_errors_sheets = model.objects.exclude(monitor__country__in=F('country'))
              for sheet in country_errors_sheets:
                  sheet.country = sheet.monitor.country
                  sheet.save()
                  self.stdout.write("%s %s" % (name, sheet.id))
  
subject: Add management command to fix sheet countries