code: def backwards(self, orm):
          "Write your backwards methods here."
          orm['avocado.DataField'].objects.filter(app_name='samples', model_name='batch',
              field_name='id').delete(f backwards(self, orm):
          "Write your backwards methods here."
          orm['avocado.DataField'].objects.filter(app_name='samples', model_name='batch',
              field_name='id').delete()
docs: Write your backwards methods here.