check section playlist

programs/admin.py

@@ -132,7 +132,7 @@ class DiffusionAdmin(admin.ModelAdmin):
         We want rerun to redirect to the given object.
         """
         obj = super().get_object(*args, **kwargs)
-        if obj.initial:
+        if obj and obj.initial:
             obj = obj.initial
         return obj
 

programs/models.py

@@ -78,6 +78,7 @@ class Track(Nameable):
     )
     tags = TaggableManager(
         verbose_name=_('tags'),
+        blank=True,
     )
 
     def __str__(self):