diff --git a/program/models.py b/program/models.py
index a7033ec43300baa15dca026e7959d4c16c3d343f..eef98fae9c009d099482770cd544cb7dac451f3b 100644
--- a/program/models.py
+++ b/program/models.py
@@ -231,10 +231,6 @@ class ProgramSlot(models.Model):
             for k in range(len(starts)):
                 if starts[k].date() > old.until:
                     timeslot = TimeSlot.objects.create(programslot=self, start=starts[k], end=ends[k])
-        elif self.until < old.until:
-            for k in range(len(starts)):
-                if starts[k].date() < old.until:
-                    timeslot = TimeSlot.objects.get(programslot=self, start=starts[k]).delete()
 
     def timeslot_count(self):
         return self.timeslots.count()