How to extend symposion.conference.models.Conference model without creating `Section` table?

[qhhonx]

Suppose I just want to customize the Conference model now. So I write these codes.

from symposion.conference.models import Conference

class ConferenceDetail(Conference):
    """
    Store conference details
    """
    location = models.CharField(max_length=50)
    # ...

However, when I run python manage.py syncdb, three tables, namely conference,section,conferencedetail, be created and I don't need section table. BTW, I do not put symposion into INSTALLED_APPS.