title: Duplicate column name
body: <p>I've changed my models an then I tried to migrate them, but got this error:</p>
  
  <pre><code>python manage.py migrate
  Operations to perform:
    Apply all migrations: admin, contenttypes, auth, sessions, myapp
  Running migrations:
    Rendering model states... DONE
    Applying myapp.0002_auto_20160315_1544...Traceback (most recent call last):
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
      return self.cursor.execute(sql, params)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/mysql/base.py", line 112, in execute
      return self.cursor.execute(query, args)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 226, in execute
      self.errorhandler(self, exc, value)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
      raise errorvalue
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 217, in execute
      res = self._query(query)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 378, in _query
      rowcount = self._do_query(q)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 341, in _do_query
      db.query(q)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/connections.py", line 280, in query
      _mysql.connection.query(self, query)
  _mysql_exceptions.OperationalError: (1060, "Duplicate column name 'short_description_eng'")
  
  The above exception was the direct cause of the following exception:
  
  Traceback (most recent call last):
    File "manage.py", line 10, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
      utility.execute()
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/core/management/__init__.py", line 345, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/core/management/base.py", line 348, in run_from_argv
      self.execute(*args, **cmd_options)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/core/management/base.py", line 399, in execute
      output = self.handle(*args, **options)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 200, in handle
      executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/migrations/executor.py", line 92, in migrate
      self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards
      state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/migrations/executor.py", line 198, in apply_migration
      state = migration.apply(state, schema_editor)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/migrations/migration.py", line 123, in apply
      operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards
      field,
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/mysql/schema.py", line 50, in add_field
      super(DatabaseSchemaEditor, self).add_field(model, field)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 396, in add_field
      self.execute(sql, params)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 110, in execute
      cursor.execute(sql, params)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
      return self.cursor.execute(sql, params)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/utils.py", line 95, in __exit__
      six.reraise(dj_exc_type, dj_exc_value, traceback)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/utils/six.py", line 685, in reraise
      raise value.with_traceback(tb)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
      return self.cursor.execute(sql, params)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/django/db/backends/mysql/base.py", line 112, in execute
      return self.cursor.execute(query, args)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 226, in execute
      self.errorhandler(self, exc, value)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
      raise errorvalue
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 217, in execute
      res = self._query(query)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 378, in _query
      rowcount = self._do_query(q)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/cursors.py", line 341, in _do_query
      db.query(q)
    File "/home/bootuz/final/myvenv/lib/python3.4/site-packages/MySQLdb/connections.py", line 280, in query
      _mysql.connection.query(self, query)
  django.db.utils.OperationalError: (1060, "Duplicate column name 'short_description_eng'")
  </code></pre>
  
  <p>This is my models:</p>
  
  <pre><code>class Words(models.Model):
      title = models.CharField(max_length=100, unique=True, verbose_name='Слово')
      audio = models.FileField(upload_to='audio', blank=True, verbose_name='Озвучка')
      short_description_rus = models.CharField(max_length=100, default='', blank=True, verbose_name='Условное обозначение Рус')
      russian = models.TextField(default='', blank=True, verbose_name='Русский')
      short_description_eng = models.CharField(max_length=110, default='', blank=True, verbose_name='Условное обозначение Eng')
      english = models.TextField(default='', blank=True, verbose_name='English')
      short_description_tur = models.CharField(max_length=100, default='', blank=True, verbose_name='Условное обозначение Tür')
      turkish = models.TextField(default='', blank=True, verbose_name='Türkçe')
  </code></pre>
  
  <p>Whats wrong?</p>
  
  <p>Migration file</p>
  
  <pre><code># -*- coding: utf-8 -*-
  # Generated by Django 1.9.2 on 2016-03-15 15:44
  from __future__ import unicode_literals
  
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('myapp', '0001_initial'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='words',
              name='short_description_eng',
              field=models.CharField(blank=True, default='', max_length=100, verbose_name='Условное обозначение Eng'),
          ),
          migrations.AddField(
              model_name='words',
              name='short_description_rus',
              field=models.CharField(blank=True, default='', max_length=100, verbose_name='Условное обозначение Рус'),
          ),
          migrations.AddField(
              model_name='words',
              name='short_description_tur',
              field=models.CharField(blank=True, default='', max_length=100, verbose_name='Условное обозначение Tür'),
          ),
          migrations.AlterField(
              model_name='words',
              name='audio',
              field=models.FileField(blank=True, upload_to='audio', verbose_name='Озвучка'),
          ),
          migrations.AlterField(
              model_name='words',
              name='english',
              field=models.TextField(blank=True, default='', verbose_name='English'),
          ),
          migrations.AlterField(
              model_name='words',
              name='russian',
              field=models.TextField(blank=True, default='', verbose_name='Русский'),
          ),
          migrations.AlterField(
              model_name='words',
              name='title',
              field=models.CharField(max_length=100, unique=True, verbose_name='Слово'),
          ),
          migrations.AlterField(
              model_name='words',
              name='turkish',
              field=models.TextField(blank=True, default='', verbose_name='Türkçe'),
          ),
      ]
  </code></pre>