djnago-extra-viewsを使っているが、テンプレートに(Hidden field TOTAL_FORMS) This field is required. と表示されてしまう

class Property(models.Model):
    customer_id = models.ForeignKey(Customer, on_delete=models.CASCADE,null=True)
    name = models.CharField(max_length=32,blank=True)
    address = models.CharField('住所',max_length=32,blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.name
    
    def get_absolute_url(self):
        return reverse("properties:properties")

class Estimate(models.Model):
    estimate_id = models.CharField(blank=True,max_length = 255)
    property_id = models.ForeignKey(Property, on_delete = models.CASCADE,related_name="property")
    ref_customer_id = models.ForeignKey(Customer,on_delete=models.CASCADE, null=True)
    customer_name = models.CharField('顧客名',max_length = 255)
    customer_email = models.EmailField('顧客メールアドレス',max_length = 255,blank=True)
    customer_tel = models.CharField('顧客電話番号',max_length = 11,blank=True)
    customer_postal_code = models.CharField('顧客郵便番号',max_length = 1024,blank=True)
    customer_address = models.CharField('顧客住所',blank=True,max_length = 1024)
    ref_property_id = models.IntegerField('物件ID',blank=True,default=0)
    property_address = models.CharField('物件住所',max_length = 1024,blank=True)
    version = models.CharField("バージョン",max_length = 255,blank=True)
    estimated_amount = models.IntegerField('見積金額',default=0)
    estimated_pdf = models.CharField('見積書',max_length=255,blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)    
    
    def __str__(self):
        return self.customer_name

from extra_views import CreateWithInlinesView, InlineFormSetFactory


class EstimateInline(InlineFormSetFactory):
    model = Estimate
    fields = ["estimate_id"]


class CreatePropertyView(CreateWithInlinesView):
    model = Property
    inlines = [EstimateInline]
    fields = ["customer_id", "name", "address"]
    template_name = 'tect/properties/estimates/create.html'
    
    def get_success_url(self):
        return self.object.get_absolute_url()

<form action="" method="post">{% csrf_token %}
            {{ form.as_p }}

            {% for formset in inlines %}
                {{ formset }}
            {% endfor %}

            <div class="d-grid col-3 mx-auto pt-5">
                <button class="btn btn-outline-dark shadow" type="submit"">保存</button>
            </div>
        </div>
</form>