Python-сообщество

Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 354, in execute
    django.setup()
  File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 21, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 89, in populate
    "duplicates: %s" % app_config.label)
django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: messages

from django.conf import settings
from django.db import models
from django.contrib.auth.models import User
from django.contrib.auth.models import AbstractUser
class Organizations(models.Model):
    org_name = models.CharField(max_length = 50)
    org_address = models.TextField()
    org_rate = models.DecimalField(max_digits=3, decimal_places=2)
    org_owner = models.CharField(max_length = 50)
    def __unicode__(self):
        return self.org_name
    class Meta:
      db_table = 'organizations'
      verbose_name_plural = "Organizations"
      ordering = ['org_name']
class Profiles(AbstractUser):
    organization = models.ForeignKey(Organizations)
    pid = models.ForeignKey('self', blank=True, null=True)
    path = models.CharField(max_length = 50)
    address = models.TextField()
    phone = models.IntegerField(max_length=13, unique=True)
    user_ip = models.GenericIPAddressField(unpack_ipv4=False)
    def __unicode__(self):
        return self.username
    class Meta:
      db_table = 'profiles'
      verbose_name_plural = "Profiles"
    
class Documents(models.Model):
    owner = models.ForeignKey(settings.AUTH_USER_MODEL)
    doc = models.FileField(upload_to = 'file_archive/')
       
    class Meta:
      db_table = 'documents'
      verbose_name_plural = "Documents"

class ProfilesAdmin(admin.ModelAdmin):
    list_display = ('organization', 'address','phone', )
    list_filter = ('organization',)
    search_fields = ('phone',)
    #cant edit this field
    #exclude = ('pid','path',)
    #readonly_fields = ('user',)
    #fields = (('owner','created'),'text',)
    list_per_page = 50
class OrganizationAdmin(admin.ModelAdmin):
    list_display = ('org_name','org_address','org_owner',)
    list_filter = ('org_rate',)
    search_fields = ('org_name','org_owner')
    list_per_page = 10
admin.site.register(profiles, ProfilesAdmin)
admin.site.register(organizations, OrganizationAdmin)