I'm trying to index a model in Solr with django-haystack, but it returns me the following error(when using rebuild\_index or update\_index) :

```
Failed to add documents to Solr: [Reason: ERROR:unknown field 'django_ct']

```

I followed step by step the "getting started" of Haystack-Search.

I'm using :

* the latest version of Apache Solr (1.4.1)
* the latest version of django-haystack

my search\_indexes.py :

```
from haystack.indexes import *
from haystack import site
from models import Entity

class EntityIndex(SearchIndex):
    name = CharField(document=True)

    def get_queryset(self):
        return Entity.objects.all()

site.register(Entity, EntityIndex)

```