title: After changed latin1_swedish_ci to utf8_general_ci can't migrate db
body: <p>Yesterday I deleted my db tables, cause I needed change latin1_swedish_ci to utf8_general_ci for have a polish words in my apps. After that i can't do full migrate my database, because I have problem like that:</p>
  
  <pre><code>    (venv) C:\netbast\fastandbeauty\project&gt;manage.py migrate
  Operations to perform:
    Apply all migrations: admin, auth, comments, contenttypes, registration, sessions, social_django, user_content, user_profile
  Running migrations:
    Applying social_django.0005_auto_20160727_2333...Traceback (most recent call last):
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\utils.py", line 65, in execute
      return self.cursor.execute(sql, params)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\mysql\base.py", line 101, in execute
      return self.cursor.execute(query, args)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 250, in execute
      self.errorhandler(self, exc, value)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\connections.py", line 50, in defaulterrorhandler
      raise errorvalue
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 247, in execute
      res = self._query(query)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 411, in _query
      rowcount = self._do_query(q)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 374, in _do_query
      db.query(q)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\connections.py", line 292, in query
      _mysql.connection.query(self, query)
  _mysql_exceptions.OperationalError: (1071, 'Specified key was too long; max key length is 1000 bytes')
  
  The above exception was the direct cause of the following exception:
  
  Traceback (most recent call last):
    File "C:\netbast\fastandbeauty\project\manage.py", line 22, in &lt;module&gt;
      execute_from_command_line(sys.argv)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\core\management\__init__.py", line 363, in execute_from_command_line
      utility.execute()
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\core\management\__init__.py", line 355, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\core\management\base.py", line 283, in run_from_argv
      self.execute(*args, **cmd_options)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\core\management\base.py", line 330, in execute
      output = self.handle(*args, **options)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\core\management\commands\migrate.py", line 204, in handle
      fake_initial=fake_initial,
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\migrations\executor.py", line 115, in migrate
      state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\migrations\executor.py", line 145, in _migrate_all_forwards
      state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\migrations\executor.py", line 244, in apply_migration
      state = migration.apply(state, schema_editor)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\migrations\migration.py", line 129, in apply
      operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\migrations\operations\models.py", line 536, in database_forwards
      getattr(new_model._meta, self.option_name, set()),
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\base\schema.py", line 353, in alter_unique_together
      self.execute(self._create_unique_sql(model, columns))
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\base\schema.py", line 120, in execute
      cursor.execute(sql, params)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\utils.py", line 80, in execute
      return super(CursorDebugWrapper, self).execute(sql, params)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\utils.py", line 65, in execute
      return self.cursor.execute(sql, params)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\utils.py", line 94, in __exit__
      six.reraise(dj_exc_type, dj_exc_value, traceback)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\utils\six.py", line 685, in reraise
      raise value.with_traceback(tb)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\utils.py", line 65, in execute
      return self.cursor.execute(sql, params)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\django\db\backends\mysql\base.py", line 101, in execute
      return self.cursor.execute(query, args)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 250, in execute
      self.errorhandler(self, exc, value)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\connections.py", line 50, in defaulterrorhandler
      raise errorvalue
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 247, in execute
      res = self._query(query)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 411, in _query
      rowcount = self._do_query(q)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\cursors.py", line 374, in _do_query
      db.query(q)
    File "C:\netbast\fastandbeauty\venv\lib\site-packages\MySQLdb\connections.py", line 292, in query
      _mysql.connection.query(self, query)
  django.db.utils.OperationalError: (1071, 'Specified key was too long; max key length is 1000 bytes')
  </code></pre>
  
  <p>I don't know what can I do, because I'm apprentice. I found answers, but it didn't help me.</p>
  
  <p>Sorry for my bad English.</p>
  
  <p>PS. When I start server it runs, but social-django doesn't work. Only that app can't migrate.</p>
  
  <p>All the best,
  Dinson</p>