Updating a profile image in django - django-models

Question

so I have this issue when trying to update a profile photo in django.
The Profile photo actually updates if I upload an image. But there are cases where a user may want to update other details on the profile update page without having to update the profile photo.
Trying to implement that gave me a multivalue error.
I've been on it for some time now, Please, who knows how I can handle that.
Here's my code on views.py file
def profile_update(request, user_id):
if request.method == 'POST':
user_obj = User.objects.get(id=user_id)
user_profile_obj = UserProfile.objects.get(user=user_id)
user_img = request.FILES['user_img']
username = request.POST["username"]
email = request.POST["email"]
phone = request.POST["phone"]
address = request.POST["address"]
fs_handle = FileSystemStorage()
img_name = 'uploads/profile_pictures/user_{0}'.format(user_id)
if fs_handle.exists(img_name):
fs_handle.delete(img_name)
fs_handle.save(img_name, user_img)
user_profile_obj.profile_pic = img_name
user_profile_obj.phone = phone
user_profile_obj.address = address
user_profile_obj.save()
user_obj.username = username
user_obj.email = email
user_obj.save()
user_obj.refresh_from_db()
Here's my models.py file
`
class UserProfile(models.Model):
user = models.OneToOneField(User, null=True, on_delete=models.CASCADE)
address = models.CharField(max_length=65, null=True, blank=True)
phone = models.CharField(max_length=65, null=True, blank=True)
profile_pic = models.FileField(null=True, blank=True, upload_to="uploads/profile_pictures", validators = [FileExtensionValidator(allowed_extensions=['jpg','jpeg','png'])])
def __str__(self):
return str(self.user)
`