When creating through objects.create(), an IntegrityError is thrown. How to fix?

Question

Django

There is a code:

o = Foo.objects.create(date=date.today())
o.save()

And model:

class Foo(models.Model):
    date = models.DateField(verbose_name='Дата создания', blank=False)

When executing the code, an error occurs:

Exception Type:	IntegrityError
Exception Value:	
UNIQUE constraint failed: foos_foos.id

Answer 1

Looks strange. Are there any objects in table Foo ? What if we delete the table and create it again? What DBMS?