From 61e5c6b468fe151fd8d009295ff8df7faf1fab9b Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Mon, 10 Sep 2018 17:40:56 +0200
Subject: [PATCH] Fix bug editing addon products

---
 src/pretix/control/forms/item.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pretix/control/forms/item.py b/src/pretix/control/forms/item.py
index 4661b17bd4..e636b0e623 100644
--- a/src/pretix/control/forms/item.py
+++ b/src/pretix/control/forms/item.py
@@ -405,7 +405,7 @@ class ItemAddOnsFormSet(I18nFormSet):
 
     def clean(self):
         super().clean()
-        categories = set(self.queryset.values_list('addon_category_id', flat=True))
+        categories = set()
         for i in range(0, self.total_form_count()):
             form = self.forms[i]
             if self.can_delete: