title: django.db.utils.ProgrammingError: relation already exists
body: <p>I'm trying to set up the tables for a new django project (that is, the tables do NOT already exist in the database); the django version is 1.7 and the db back end is PostgreSQL. The name of the project is crud.  Results of migration attempt follow:</p>
  
  <p><code>python manage.py makemigrations crud</code></p>
  
  <pre><code>Migrations for 'crud':
    0001_initial.py:
      - Create model AddressPoint
      - Create model CrudPermission
      - Create model CrudUser
      - Create model LDAPGroup
      - Create model LogEntry
      - Add field ldap_groups to cruduser
      - Alter unique_together for crudpermission (1 constraint(s))
  </code></pre>
  
  <p><code>python manage.py migrate crud</code></p>
  
  <pre><code>Operations to perform:
    Apply all migrations: crud
  Running migrations:
    Applying crud.0001_initial...Traceback (most recent call last):
    File "manage.py", line 18, in &lt;module&gt;
      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 377, in execute
      self.fetch_command(subcommand).run_from_argv(self.argv)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 288, in run_from_argv
      self.execute(*args, **options.__dict__)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 338, in execute
      output = self.handle(*args, **options)
    File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 161, in handle
      executor.migrate(targets, plan, fake=options.get("fake", False))
    File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 68, in migrate
      self.apply_migration(migration, fake=fake)
    File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 102, in apply_migration
      migration.apply(project_state, schema_editor)
    File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/migration.py", line 108, in apply
      operation.database_forwards(self.app_label, schema_editor, project_state, new_state)
    File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/operations/models.py", line 36, in database_forwards
      schema_editor.create_model(model)
    File "/usr/local/lib/python2.7/dist-packages/django/db/backends/schema.py", line 262, in create_model
      self.execute(sql, params)
    File "/usr/local/lib/python2.7/dist-packages/django/db/backends/schema.py", line 103, in execute
      cursor.execute(sql, params)
    File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 82, in execute
      return super(CursorDebugWrapper, self).execute(sql, params)
    File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 66, in execute
      return self.cursor.execute(sql, params)
    File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 94, in __exit__
      six.reraise(dj_exc_type, dj_exc_value, traceback)
    File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 66, in execute
      return self.cursor.execute(sql, params)
  django.db.utils.ProgrammingError: relation "crud_crudpermission" already exists
  </code></pre>
  
  <p>Some highlights from the migration file:</p>
  
  <pre><code>dependencies = [
      ('auth', '0001_initial'),
      ('contenttypes', '0001_initial'),
  ]
      migrations.CreateModel(
          name='CrudPermission',
          fields=[
              ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
              ('_created_by', models.CharField(default=b'', max_length=64, null=True, editable=False, blank=True)),
              ('_last_updated_by', models.CharField(default=b'', max_length=64, null=True, editable=False, blank=True)),
              ('_created', models.DateTimeField(null=True, editable=False, blank=True)),
              ('_last_updated', models.DateTimeField(null=True, editable=False, blank=True)),
              ('domain', models.CharField(max_length=32, choices=[(b'town', b'Town'), (b'boe', b'BOE'), (b'police', b'Police')])),
              ('ldap_group', models.CharField(max_length=128, verbose_name=b'LDAP group')),
              ('can_add', models.BooleanField(default=False, verbose_name=b'add')),
              ('can_change', models.BooleanField(default=False, verbose_name=b'change')),
              ('restrict_change_to_own', models.BooleanField(default=False)),
              ('can_delete', models.BooleanField(default=False, verbose_name=b'delete')),
              ('restrict_delete_to_own', models.BooleanField(default=False)),
              ('models', models.ManyToManyField(to='contenttypes.ContentType', null=True, blank=True)),
          ],
          options={
              'verbose_name': 'CRUD permission',
          },
          bases=(models.Model,),
      ),
      migrations.AlterUniqueTogether(
          name='crudpermission',
          unique_together=set([('ldap_group', 'can_add', 'can_change', 'can_delete', 'domain')]),
      )
  </code></pre>
  
  <p>,</p>
  
  <p>The crud app is not meant to actually do anything, but I use it another app, so when I try migrate from that app, I trigger the above problem.</p>
  
  <p>I've found other examples on the web of people with similar issues, but none of their cases seem to apply because</p>
  
  <ol>
  <li>The problem affects an entire relation, not just one column</li>
  <li>I am not using multiple inheritance.</li>
  </ol>
  
  <p>Where should I look next to find the underlying problem?</p>