Django: Could not load model - NOT NULL constraint failed

Question

how are you all?

We are not able to insert the fixures data into our SQLite3 database.

We are using UUid as our model id.

Using the comand python.exe .\manage.py loaddata start.json

Model

class Estadual(models.Model):
    # Fields
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    estado = models.CharField(max_length=50)
    sigla = models.CharField(max_length=2, unique=True)
    valor = models.PositiveSmallIntegerField()
    created = models.DateTimeField(auto_now_add=True, editable=False)
    last_updated = models.DateTimeField(auto_now=True, editable=False)

    # Relationships
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)

    class Meta:
        pass

start.json

[
  {
    "model": "app.estadual",
    "pk": "59472bb0-7f6e-4026-a900-727b7cdd647f",
    "fields": {
      "estado": "AC",
      "sigla": "AC",
      "valor": 12,
      "user": ["4a695e40-6b3a-49fa-8beb-eed853ce17b0"]
    }
  },{
    "model": "app.estadual",
    "pk": "5b321ca7-e8be-4580-8d36-080c663d5397",
    "fields": {
      "estado": "AL",
      "sigla": "AL",
      "valor": 12,
      "user": ["4a695e40-6b3a-49fa-8beb-eed853ce17b0"]
    }
  }
]

Error

Problem installing fixture 'C:...fixtures\start.json': Could not load app.Estadual(pk=59472bb0-7f6e-4026-a900-727b7cdd647f): NOT NULL constraint failed: app_estadual.created