title: Multiple default values specified for column "id" of the table
body: <p>I use to run my website on my laptop and its database was Sqlite, recently I wanted to transfer it to DigitalOcean and I changed its database to Postgresql, but when I migrate I encounters with some problems.</p>
  
  <p>Python 3.4
  Django 1.8</p>
  
  <h1>Error</h1>
  
  <pre><code>django.db.utils.ProgrammingError: multiple default values specified for column "id" of table "profiles_userprofile"
  </code></pre>
  
  <h1>My Model</h1>
  
  <pre><code>class UserProfile(models.Model):
      user = models.OneToOneField(User)
      avatar = models.ImageField(blank=True, upload_to=get_image_path, default='/static/image/avatar/male.png')
      age = models.IntegerField(default=4, validators=[MinValueValidator(3), MaxValueValidator(99)])
  </code></pre>
  
  <p>What should I do?</p>