In my Django app I have model:

class Voivodeship(models.Model):
    name = models.CharField(max_length=20, primary_key=True)

I also have script to build my database from raw data:

import app.models as models
...
voivodeships[name] = models.Voivodeship(name=name)
voivodeships[name].save()

But when I try to interpret it in python manage.py shell using exec (exec(open('filler.py').read())) it returns error:

'Voivodeship' object has no attribute '_state'

And I don't know what's going on. Can you suggest me any solution?