From 7ab671fea7fda45be5994d85378bfb326eddd7fb Mon Sep 17 00:00:00 2001
From: Anler Hp <anler86@gmail.com>
Date: Mon, 23 Jun 2014 12:11:02 +0200
Subject: [PATCH] Fix invalid use of F() when creating user story

---
 taiga/projects/occ/mixins.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/taiga/projects/occ/mixins.py b/taiga/projects/occ/mixins.py
index 727e57e6..e10bf386 100644
--- a/taiga/projects/occ/mixins.py
+++ b/taiga/projects/occ/mixins.py
@@ -31,7 +31,9 @@ class OCCResourceMixin(object):
         if current_version != param_version:
             raise exc.WrongArguments({"version": "The version doesn't match with the current one"})
 
-        obj.version = models.F('version') + 1
+        if obj.id:
+            obj.version = models.F('version') + 1
+
         super().pre_save(obj)