Django using uuid as primary key, receive AttributeError during createsuperuser

[Sean, Liu Diansheng]

I am using uuid as the primary key for my CustomerUser model which is to override the default django user. I got an AttributeError when trying to run ./manage.py createsuperuser

Here is my model.
`
class CustomUser(AbstractUser):

id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
user_type = models.CharField(max_length=1, choices=TYPE_USER, default='U')
is_deleted = models.BooleanField(_('deleted'), default=False)

`
Software version: django version 1.10.2 and python version 2.7.10

And this is the exception

`
value = uuid.UUID(value)

File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/uuid.py", line 131, in init

hex = hex.replace('urn:', '').replace('uuid:', '')

AttributeError: 'long' object has no attribute 'replace'
`