Fix bug: add scope disable for send_event_webhook (#543)

* Disable scope of webhook event

* Change variable name

* Remove draft file

Author: HungNgien

src/pretix/eventyay_common/base_tasks.py

@@ -218,11 +218,12 @@ def on_success(self, retval: Any, task_id: str, args: tuple, kwargs: dict) -> An
         Returns:
             Any: Result from parent class on_success method
         """
-        event = kwargs.get("event", {}).get("slug", "")
+        event_slug = kwargs.get("event", {}).get("slug", "")
         try:
-            event = Event.objects.get(slug=event)
-            event.settings.set("create_for", EventCreatedFor.BOTH.value)
-            event.save()
+            with scopes_disabled():
+                event = Event.objects.get(slug=event_slug)
+                event.settings.set("create_for", EventCreatedFor.BOTH.value)
+                event.save()
         except Event.DoesNotExist:
-            logger.error("Event with slug %s does not exist", event)
+            logger.error("Event with slug %s does not exist", event_slug)
         return super().on_success(retval, task_id, args, kwargs)