I'm trying to extend the built-in user and add some more information to it. I have two apps in my django project- general and user\_details. Inside my user\_details app, in the models.py file, I have the following...

```
from django.db import models
from django.db.models.signals import post_save
from django.contrib.auth.models import User
from django.dispatch import receiver
from general.models import Ward

class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    firstname = models.CharField(max_length=20)
    middlename = models.CharField(max_length=20)
    lastname = models.CharField(max_length=20)
    loc_id = models.CharField(max_length=8, unique=True) 
    ward = models.ForeignKey(Ward, related_name="wards", on_delete=models.CASCADE)
    phone = models.CharField(max_length=10, unique=True)
    address = models.CharField(max_length=255)
    postal_code = models.CharField(max_length=15)

    def __str__(self):
        return "{} {}".format(self.user.first_name, self.user.last_name)

    class Meta:
        verbose_name_plural = "User details"

@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance)
    else:
        instance.profile.save()

```

I have successfully done this before but today for some reason when I try to log in via the django admin, I keep getting the `RelatedObjectDoesNotExist at /admin/login/, no such column: user_details_profile.id`. There are no other components involved, no views or any of that. It's just models and the admin panel. I'm trying to get the model to show in the admin panel but I ran into this error every time I try to log in.
Here is the traceback <http://dpaste.com/0W7653C>. 
Can anyone tell me what I am doing wrong please and how I can get it to work. Help.