Index: /trunk/exodus/models.py
===================================================================
--- /trunk/exodus/models.py	(revision 6662)
+++ /trunk/exodus/models.py	(revision 6674)
@@ -55,4 +55,5 @@
         # bound to the Antenna instead
         for i in self.interface_set.all():
+            i.antenna = None;
             i.save();
         super(Antenna, self).delete()