fix(pages.py): fix event's other occurrences not being deleted when changing event from recurrent to single

Closes #1

home/models/pages.py

@@ -330,12 +330,15 @@ class EventPage(Page):
         now = timezone.now()
         if not self.recurrence_enabled:
             # if recurrence is not enabled, ensure there's at least one occurrence for the specified start/end
+            # and delete any other occurrences that don't match the current start/end
             if self.occurrences.exists():
                 occurrence = self.occurrences.first()
                 if occurrence.start != self.start or occurrence.end != self.end:
                     occurrence.start = self.start
                     occurrence.end = self.end
                     occurrence.save(update_fields=["start", "end"])
+
+                self.occurrences.exclude(id=occurrence.id).delete()
             else:
                 EventOccurrence.objects.create(
                     event=self, start=self.start, end=self.end