What is wrong with the form?

Question

Django

Mistake:

return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: UNIQUE constraint failed: user_user.username

Models.py:

class User(AbstractUser):
    country = models.CharField(max_length=35, null = True, blank = True)
    city = models.CharField(max_length=35, null = True, blank = True)
    bio = models.CharField(max_length=150, null = True, blank = True)
    image = models.ImageField(upload_to = 'static/images', blank = True)

    def __str__(self):
        return self.username

class UserSettingsForm(ModelForm):
    User = get_user_model()
    class Meta:
        model = User
        fields = ['image']

Views.py:

imgform = UserSettingsForm(request.POST, request.FILES)
                if imgform.is_valid():
                    imgform.save()
                    return redirect('/user/profile')

Answer 1

1. there is already a record in the database with the same username
2. always show the full traceback of the error
3. stop giving questions the heading "What's wrong with the form?" and the like, it should contain a brief description of the problem.