--- a/app/soc/views/models/group_app.py	Sat Feb 07 22:47:51 2009 +0000
+++ b/app/soc/views/models/group_app.py	Sat Feb 07 22:49:51 2009 +0000
@@ -80,7 +80,7 @@
 
     new_params['create_extra_dynafields'] = {
         'backup_admin_link_id': widgets.ReferenceField(
-              reference_url='user',
+              reference_url='user', required=False,
               label=params['logic'].getModel().backup_admin.verbose_name),
         'clean_backup_admin_link_id': 
             cleaning.clean_users_not_same('backup_admin_link_id'),