title: django -OperationalError: (1054, "Unknown column 'registration_register.mobilexnumber' in 'field list'")
body: <p>I am new to django as well as python. I am trying to create a registration and login form.The test registration page works with only the <code>username</code>, <code>email</code> and <code>password</code>. When i try to add <code>firstname</code>, <code>lastname</code> fields for my registration form there was no problem but when i added a new field <code>mobilexnumber</code>, when I go to the admin page, I get the following error<p>
  <strong>OperationalError at /admin/registration/register/</strong>
  <p></p>
  
  <blockquote>
    <p>(1054, "Unknown column 'registration_register.mobilexnumber' in 'field list'")</p>
  </blockquote>
  
  <p><strong>models.py</strong></p>
  
  <pre><code>class Register(models.Model):
      username = models.CharField(max_length=30)
      email = models.EmailField(max_length=254)
      password = models.CharField(max_length=30)
      firstname = models.CharField(max_length=50)
      lastname = models.CharField(max_length=50)
      mobilexnumber = models.CharField(max_length=50)
      samplefld = models.CharField(max_length=30)
  </code></pre>
  
  <p><strong>forms.py</strong></p>
  
  <pre><code>class RegForm(forms.ModelForm):
  
  class Meta:
      model = Register
      fields = ('username', 'email', 'password', 'firstname', 'lastname','mobilexnumber', 'samplefld', )
      widgets = {
          'password': forms.PasswordInput(),
      }
  </code></pre>
  
  <p>Dont mind the <code>samplefld</code>. It was used for some error checking. Even without this field I get the same error.</p>
  
  <p>I am using the following:</p>
  
  <p>Django ver 1.9</p>
  
  <p>Python ver 2.7.11</p>
  
  <p>Pycharm ver 5.0.2</p>
  
  <p>mySQL as database</p>
  
  <p>Thanks!</p>