From 10fc80d9be0dfce6071b47fbd97c542e92ad9954 Mon Sep 17 00:00:00 2001
From: bkfox <thomas bkfox net>
Date: Wed, 11 Jan 2017 10:35:06 +0100
Subject: [PATCH] fix bug when saving diff pointing to initial diff

---
 aircox/models.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/aircox/models.py b/aircox/models.py
index a7bbd6d..fcf91ff 100755
--- a/aircox/models.py
+++ b/aircox/models.py
@@ -727,7 +727,8 @@ class Schedule(models.Model):
         if self.initial:
             self.program = self.initial.program
             self.duration = self.initial.duration
-            self.frequency = self.initial.frequency
+            if not self.frequency:
+                self.frequency = self.initial.frequency
         super().save(*args, **kwargs)
 
     class Meta: