IntegrityError at order/order/add/ null value in column "total_incl_tax" violates not-null constraint DETAIL: Сбойная строка содержит

Когда я пытаюсь добавить цену в django oscar я получаю эту ошибку и это поле не редактируемо в модели и не доступно для записи

Мне нужна помощь, чтобы сделать это IntegrityError at order/order/add/ null value in column "total_incl_tax" violates not-null constraint DETAIL: Неудачная строка содержит

class AbstractOrder(models.Model):
"""
The main order model
"""
number = models.CharField(
    _("Order number"), max_length=128, db_index=True, unique=True)

# We track the site that each order is placed within
site = models.ForeignKey(
    'sites.Site', verbose_name=_("Site"), null=True,
    on_delete=models.SET_NULL)

basket = models.ForeignKey(
    'basket.Basket', verbose_name=_("Basket"),
    null=True, blank=True, on_delete=models.SET_NULL)

# Orders can be placed without the user authenticating so we don't always
# have a customer ID.
user = models.ForeignKey(
    AUTH_USER_MODEL, related_name='orders', null=True, blank=True,
    verbose_name=_("User"), on_delete=models.SET_NULL)

# Billing address is not always required (eg paying by gift card)
billing_address = models.ForeignKey(
    'order.BillingAddress', null=True, blank=True,
    verbose_name=_("Billing Address"),
    on_delete=models.SET_NULL)

# Total price looks like it could be calculated by adding up the
# prices of the associated lines, but in some circumstances extra
# order-level charges are added and so we need to store it separately
currency = models.CharField(
    _("Currency"), max_length=12, default=get_default_currency)
total_incl_tax = models.DecimalField(
    _("Order total (inc. tax)"), decimal_places=2, max_digits=12)
total_excl_tax = models.DecimalField(
    _("Order total (excl. tax)"), decimal_places=2, max_digits=12)

# Shipping charges
shipping_incl_tax = models.DecimalField(
    _("Shipping charge (inc. tax)"), decimal_places=2, max_digits=12,
    default=0)
shipping_excl_tax = models.DecimalField(
    _("Shipping charge (excl. tax)"), decimal_places=2, max_digits=12,
    default=0)

# Not all lines are actually shipped (such as downloads), hence shipping
# address is not mandatory.
shipping_address = models.ForeignKey(
    'order.ShippingAddress', null=True, blank=True,
    verbose_name=_("Shipping Address"),
    on_delete=models.SET_NULL)
shipping_method = models.CharField(
    _("Shipping method"), max_length=128, blank=True)

# Identifies shipping code
shipping_code = models.CharField(blank=True, max_length=128, default="")

# Use this field to indicate that an order is on hold / awaiting payment
status = models.CharField(_("Status"), max_length=100, blank=True)
guest_email = models.EmailField(_("Guest email address"), blank=True)

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