Create unique labels for "Service Design" pages and updated reference
Issue-ID: DOC-468

Signed-off-by: andreasgeissler <andreas-geissler@telekom.de>
Change-Id: I879dbd67a51f9508642d81bb17412193764fb9ce
diff --git a/docs/guides/onap-user/design/service-design/index.rst b/docs/guides/onap-user/design/service-design/index.rst
index dcc6b9c..83217bd 100644
--- a/docs/guides/onap-user/design/service-design/index.rst
+++ b/docs/guides/onap-user/design/service-design/index.rst
@@ -2,6 +2,8 @@
 .. International License. http://creativecommons.org/licenses/by/4.0
 .. Copyright 2019 ONAP Contributors. All rights reserved.
 
+.. _doc_guide_user_des_ser-des:
+
 Service Design
 ==============
 
@@ -30,7 +32,7 @@
 Create a Service
 ----------------
 
-**Prerequisites:** Create VFs required for this service (see :ref:`vfcreation-and-testing`).
+**Prerequisites:** Create VFs required for this service (see :ref:`doc_guide_user_des_vf-cre`).
 
 #. From the SDC HOME page, hover over Add and select Add Service.
 #. In the General section, complete all fields.