diff --git a/src/yang/etsi-nfv-vnf.yang b/src/yang/etsi-nfv-vnf.yang
index 843a49eb4bc248ac7e7553ce8f6764e8449e4473..2078dbf9db27dc4247318a8ceede2be5ffee18dd 100755
--- a/src/yang/etsi-nfv-vnf.yang
+++ b/src/yang/etsi-nfv-vnf.yang
@@ -78,19 +78,6 @@ submodule etsi-nfv-vnf {
            VirtualNetworkInterfaceRequirements information element";
       }
 
-      leaf support-mandatory {
-        status "deprecated";
-        default "false";
-        type boolean;
-        description
-          "Indicates whether fulfilling the constraint is
-           mandatory (true) for successful operation or desirable
-           (false).";
-        reference
-          "GS NFV-IFA011: Section 7.1.6.6,
-           VirtualNetworkInterfaceRequirements information element";
-      }
-
       list network-interface-requirements {
         key "key";
         min-elements "1";