diff --git a/Doc/lectures.xml b/Doc/lectures.xml
index b7e4d57e0313fe5789227d1d45ddc5ea56e316cc..1b5dcbd56689a2465efc29e53d941b967fd1359b 100644
--- a/Doc/lectures.xml
+++ b/Doc/lectures.xml
@@ -159,7 +159,7 @@
 
   <xi:include href="DbDevel/dbDevel.xml" xpointer="element(/1)"/>
 
-  <part annotations="forumId=13;" xml:id="sdi">
+  <part  xml:id="sdi">
     <title>Software defined Infrastructure</title>
 
     <xi:include href="Sdi/unixIntro.xml" xpointer="element(/1)"/>