diff --git a/ics/machinetag.json b/ics/machinetag.json
index 035d237..ee918d3 100644
--- a/ics/machinetag.json
+++ b/ics/machinetag.json
@@ -184,18 +184,10 @@
           "value": "DA",
           "expanded": "DA"
         },
-        {
-          "value": "OPC",
-          "expanded": "OPC"
-        },
         {
           "value": "HDA",
           "expanded": "HDA"
         },
-        {
-          "value": "OPC",
-          "expanded": "OPC"
-        },
         {
           "value": "UA",
           "expanded": "UA"
@@ -419,10 +411,6 @@
           "value": "PieP",
           "expanded": "PieP"
         },
-        {
-          "value": "Ethernet Powerlink",
-          "expanded": "Ethernet Powerlink"
-        },
         {
           "value": "Profibus",
           "expanded": "Profibus"