diff --git a/src/MultiPlayer/multiplaymgr.cxx b/src/MultiPlayer/multiplaymgr.cxx
index fbcabfc7b..45a5668ee 100644
--- a/src/MultiPlayer/multiplaymgr.cxx
+++ b/src/MultiPlayer/multiplaymgr.cxx
@@ -352,16 +352,6 @@ static const IdPropertyList sIdPropertyList[] = {
     { 10527, "sim/multiplay/generic/short[27]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
     { 10528, "sim/multiplay/generic/short[28]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
     { 10529, "sim/multiplay/generic/short[29]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10520, "sim/multiplay/generic/short[20]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10521, "sim/multiplay/generic/short[21]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10522, "sim/multiplay/generic/short[22]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10523, "sim/multiplay/generic/short[23]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10524, "sim/multiplay/generic/short[24]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10525, "sim/multiplay/generic/short[25]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10526, "sim/multiplay/generic/short[26]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10527, "sim/multiplay/generic/short[27]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10528, "sim/multiplay/generic/short[28]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
-    { 10529, "sim/multiplay/generic/short[29]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
     { 10530, "sim/multiplay/generic/short[30]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
     { 10531, "sim/multiplay/generic/short[31]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },
     { 10532, "sim/multiplay/generic/short[32]", simgear::props::INT, TT_SHORTINT,  V1_1_2_PROP_ID, NULL },