1 files changed, 2 insertions, 21 deletions

diff --git a/documentation/sdk-manual/sdk-manual.xml b/documentation/sdk-manual/sdk-manual.xml
index 1bcc0c853f..6344478fb0 100755
--- a/documentation/sdk-manual/sdk-manual.xml
+++ b/documentation/sdk-manual/sdk-manual.xml
@@ -1,6 +1,7 @@
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
 [<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >
+<!--SPDX-License-Identifier: CC-BY-2.0-UK-->
 
 <book id='sdk-manual' lang='en'
       xmlns:xi="http://www.w3.org/2003/XInclude"
@@ -72,28 +73,8 @@
             </revision>
             <revision>
                 <revnumber>3.1</revnumber>
-                <date>April 2020</date>
-                <revremark>Released with the Yocto Project 3.1 Release.</revremark>
-            </revision>
-            <revision>
-                <revnumber>3.1.1</revnumber>
-                <date>June 2020</date>
-                <revremark>Released with the Yocto Project 3.1.1 Release.</revremark>
-            </revision>
-            <revision>
-                <revnumber>3.1.2</revnumber>
-                <date>August 2020</date>
-                <revremark>Released with the Yocto Project 3.1.2 Release.</revremark>
-            </revision>
-            <revision>
-                <revnumber>3.1.3</revnumber>
-                <date>October 2020</date>
-                <revremark>Released with the Yocto Project 3.1.3 Release.</revremark>
-            </revision>
-            <revision>
-                <revnumber>3.1.4</revnumber>
                 <date>&REL_MONTH_YEAR;</date>
-                <revremark>Released with the Yocto Project 3.1.4 Release.</revremark>
+                <revremark>Released with the Yocto Project 3.1 Release.</revremark>
             </revision>
        </revhistory>