Error import spatial data in GeoDjango - KeyError for mpoly field

I was following the tutorial on http://ift.tt/1NnlWfX for setting up GeoDjango on my machine. But it seems like there is some issue there. While importing data using LayerMapping using load.run() from python shell, I get the following error:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/ubuntu/src/django/world/load.py", line 23, in run
    lm = LayerMapping(WorldBorder, world_shp, world_mapping, transform=False, encoding='iso-8859-1')
  File "/home/ubuntu/Envs/vir-env/local/lib/python2.7/site-packages/django/contrib/gis/utils/layermapping.py", line 105, in __init__
    self.check_layer()
  File "/home/ubuntu/Envs/vir-env/local/lib/python2.7/site-packages/django/contrib/gis/utils/layermapping.py", line 178, in check_layer
    ogr_field_types = self.layer.field_types
  File "/home/ubuntu/Envs/vir-env/local/lib/python2.7/site-packages/django/contrib/gis/gdal/layer.py", line 153, in field_types
    for i in range(self.num_fields)]
KeyError: 12

Then I found out that, there is no 'MULTIPOLYGON' field in the .shp file:

>>> from django.contrib.gis.gdal import DataSource
>>> ds = DataSource('world/data/TM_WORLD_BORDERS-0.3.shp')
>>> layer = ds[0]
>>> layer.fields
[u'FIPS', u'ISO2', u'ISO3', u'UN', u'NAME', u'AREA', u'POP2005', u'REGION', u'SUBREGION', u'LON', u'LAT']

So, definitely in the world_mapping file, importing will fail for the 'mpoly': 'MULTIPOLYGON' mapping. Has anyone else faced this issue? I hope so, as I've followed the tutorial step-by-step. But it doesn't say anything about such issue.

Here's my load.py file:

  1 import os
  2 from django.contrib.gis.utils import LayerMapping
  3 from models import WorldBorder
  4
  5 world_mapping = {
  6     'fips' : 'FIPS',
  7     'iso2' : 'ISO2',
  8     'iso3' : 'ISO3',
  9     'un' : 'UN',
 10     'name' : 'NAME',
 11     'area' : 'AREA',
 12     'pop2005' : 'POP2005',
 13     'region' : 'REGION',
 14     'subregion' : 'SUBREGION',
 15     'lon' : 'LON',
 16     'lat' : 'LAT',
 17     'mpoly' : 'MULTIPOLYGON',
 18 }
 19
 20 world_shp = os.path.abspath(os.path.join(os.path.dirname(__file__), 'data/TM_WORLD_BORDERS-0.3.shp'))
 21
 22 def run(verbose=True):
 23     lm = LayerMapping(WorldBorder, world_shp, world_mapping, transform=False, encoding='iso-8859-1')
 24
 25     lm.save(strict=True, verbose=verbose)