From 7386afcce6790696df514b4e7f7b1a54b7ee45b0 Mon Sep 17 00:00:00 2001
From: Per Ploug <per@umbraco.dk>
Date: Wed, 13 Jan 2016 14:39:00 +0100
Subject: [PATCH] Doctype alias validation always fails

As it only checks if there is a doctype with the same alias, but does
not test if this doctype is the same as the one currently being saved.
---
 src/Umbraco.Web/Editors/ContentTypeControllerBase.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs b/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
index 753e882772..247bf5bb0b 100644
--- a/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
+++ b/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
@@ -191,7 +191,7 @@ namespace Umbraco.Web.Editors
             
             //Validate that there's no other ct with the same name
             var exists = getContentTypeByAlias(contentTypeSave.Alias);
-            if (exists != null)
+            if (exists != null && exists.Id != ctId)
             {
                 ModelState.AddModelError("Alias", "A content type with this alias already exists");
             }