new_contents: # This is a one-off command to migrate all TariffPrice and NCSOConcession data
  # from the dmd app to the frontend app.  It can be deleted once the dmd app has
  # been removed.
  
  from django.db import transaction
  from django.core.management import BaseCommand
  
  from dmd.models import TariffPrice as TariffPriceOld
  from dmd.models import NCSOConcession as NCSOConcessionOld
  from frontend.models import TariffPrice as TariffPriceNew
  from frontend.models import NCSOConcession as NCSOConcessionNew
  
  
  class Command(BaseCommand):
      def handle(self, *args, **kwargs):
          with transaction.atomic():
              TariffPriceNew.objects.all().delete()
              NCSOConcessionNew.objects.all().delete()
  
              TariffPriceNew.objects.bulk_create(
                  TariffPriceNew(
                      date=tp_old.date,
                      vmpp_id=tp_old.vmpp_id,
                      tariff_category_id=tp_old.tariff_category_id,
                      price_pence=tp_old.price_pence,
                  )
                  for tp_old in TariffPriceOld.objects.all()
              )
  
              NCSOConcessionNew.objects.bulk_create(
                  NCSOConcessionNew(
                      date=c_old.date,
                      vmpp_id=c_old.vmpp_id,
                      drug=c_old.drug,
                      pack_size=c_old.pack_size,
                      price_pence=c_old.price_concession_pence,
                  )
                  for c_old in NCSOConcessionOld.objects.all()
              )
  
subject: Add task to migrate TariffPrice and NCSOConcession data