Fix calendars overwriting

calendar_utils/models.py

@@ -130,11 +130,7 @@ class CalendarMixin(models.Model):
     def save(self, *args, **kwargs):
         # create or update related Calendar
         if self.calendar_url:
-            if self.calendar:
-                if self.calendar.url != self.calendar_url:
-                    self.calendar.url = self.calendar_url
-                    self.calendar.save()
-            else:
+            if not self.calendar or self.calendar.url != self.calendar_url:
                 calendar = Calendar.objects.filter(url=self.calendar_url).first()
                 if calendar:
                     self.calendar = calendar