From 046be9d6e70308b765fc35fcfe9c8d874271c748 Mon Sep 17 00:00:00 2001
From: Adrian Moennich <adrian.moennich@cern.ch>
Date: Thu, 9 Jul 2015 10:59:31 +0200
Subject: [PATCH] Fix KeyError when hiding past events twice

---
 indico/MaKaC/services/implementation/category.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/indico/MaKaC/services/implementation/category.py b/indico/MaKaC/services/implementation/category.py
index 021586c25..0fc585a73 100644
--- a/indico/MaKaC/services/implementation/category.py
+++ b/indico/MaKaC/services/implementation/category.py
@@ -192,7 +192,7 @@ class SetShowPastEventsForCateg(CategoryDisplayBase):
         if self._showPastEvents:
             fpef.add(cid)
         else:
-            fpef.remove(cid)
+            fpef.discard(cid)
         session.modified = True
 
 class CategoryProtectionUserList(CategoryModifBase):
-- 
2.11.4.GIT