diff --git a/abonapp/models.py b/abonapp/models.py
index a6241cb..c0e6f6b 100644
--- a/abonapp/models.py
+++ b/abonapp/models.py
@@ -28,7 +28,7 @@ class LogicError(Exception):
 
 class AbonGroup(models.Model):
     title = models.CharField(max_length=127, unique=True)
-    profiles = models.ManyToManyField(UserProfile, related_name='abon_groups')
+    profiles = models.ManyToManyField(UserProfile, blank=True, related_name='abon_groups')
 
     class Meta:
         db_table = 'abonent_groups'