python - django - Can't save model more than once with same user -

i've created model storing track info, mp3, png , slug username associated model.

i can save model fine, when try save 1 (so there 2 models same username), django tells me "track user exists!"

i don't want that, want able save many models want same user.

here models.py (i have registered in admin panel)

from django.db import models django.core.exceptions import validationerror django.core.files.images import get_image_dimensions django.contrib.auth.models import user  # create models here.   class track(models.model):      def generate_user_folder_tracks(instance, filename):         return "uploads/users/%s/tracks/%s.mp3" % (instance.user, instance.slug)      def is_mp3(self):         if not self.name.endswith('.mp3'):             raise validationerror(u'you may upload mp3 files tracks!')      def generate_user_folder_art(instance, filename):         return "uploads/users/%s/art/%s.png" % (instance.user, instance.slug)      def is_square_png(self):         if not self.name.endswith('.png'):             raise validationerror("you may upload png files album art!")         else:             w, h = get_image_dimensions(self)             if not h == w:                 raise validationerror("this picture not square! picture must equally wide height.")             else:                 if not (h + w) >= 1000:                     raise validationerror("this picture small! minimum dimensions 500 500 pixels.")         return self       # variables      track_type_choices = [         ('org', 'original'),         ('rmx', 'remix'),         ('clb', 'collab'),         ('liv', 'live'),     ]      # model fields     user = models.foreignkey(user, unique=true)     title = models.charfield(max_length=100)         desc = models.textfield(max_length=7500)     track_type = models.charfield(max_length=3,                                  choices=track_type_choices,                                  default='org')      track_type_content = models.charfield(max_length=100,blank=true)     created = models.timefield(auto_now=true,auto_now_add=false)      upload = models.filefield(upload_to=generate_user_folder_tracks,validators=[is_mp3])     albumart = models.imagefield(upload_to=generate_user_folder_art,validators=[is_square_png])      slug = models.slugfield(max_length=50) 

any idea on going on here?

user = models.foreignkey(user, unique=true) 

unique = true means every model needs have different user. similar django's onetoone field.

make sure run

python manage.py makemigrations 

and

python manage.py migrate