Django database NOT NULL constraint failed

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#1

I have this model in Django:

    class Post(models.Model):
        updated = models.DateTimeField(auto_now=True)
        created = models.DateTimeField(auto_now_add=True)

When I create a new record in Admin Panel I get this error:

Saving Record failed: NOT NULL constraint failed: posts_post.updated

It also happend with the post.created field