--- a/sdi/forms.py	Sat Jun 05 18:07:11 2010 +0530
+++ b/sdi/forms.py	Sat Jun 05 18:18:34 2010 +0530
@@ -10,6 +10,7 @@
     topics_interested = forms.MultipleChoiceField(widget=forms.CheckboxSelectMultiple, choices=TOPICS_CHOICES, required=False)
     class Meta:
         model = Registrant
+        exclude = ['priority_for_attending', 'selected_for_attending']
     verification_code = CaptchaField()
 
     def clean_email(self):