Ошибка
Exception Value: 'DeferredAttribute' object has no attribute 'set'

class Matches(models.Model):
    title = models.CharField('Название матча', max_length=100)
    photo = models.ImageField('Фото')
    price = models.CharField('Цена билета', max_length=40)
    numb_tickets = models.IntegerField('Кол-во билетов')
    date = models.DateTimeField('Дата')
    slug = models.SlugField(default='slug')

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = 'Матч'
        verbose_name_plural = 'Матчи'

    def save(self, *args, **kwargs):
        Tickets.number.set(Tickets.objects.bulk_create(
            [Tickets(place=place, row=row) for row in range(3) for place in range(5)]))

        super(Matches, self).save(*args, **kwargs)


class Tickets(models.Model):
    match = models.ForeignKey('Matches', on_delete=models.CASCADE)
    number = models.CharField('Номер билета', max_length=400, unique=True, blank=True, primary_key=True)