diff --git a/EduNetworkBuilder/Network.cs b/EduNetworkBuilder/Network.cs
index e0c0898..1cf88a3 100644
--- a/EduNetworkBuilder/Network.cs
+++ b/EduNetworkBuilder/Network.cs
@@ -96,6 +96,7 @@ namespace EduNetworkBuilder
 
         public static void Clone(Network source, Network dest)
         {
+            int lastID = 0;
             dest.AlreadyDisplayedMessage = false;
             dest.DefaultTimeout = source.DefaultTimeout;
             dest.HintsToDisplay = source.HintsToDisplay;
@@ -103,9 +104,12 @@ namespace EduNetworkBuilder
             dest.Level = source.Level;
             dest.myHeight = source.myHeight;
             dest.myWidth = source.myWidth;
+            dest.UniqueIdentifier = source.UniqueIdentifier;
+
             //dest.NetComponents
-            foreach(NetworkComponent NC in source.NetComponents)
+            foreach (NetworkComponent NC in source.NetComponents)
             {
+                if (NC.GetUniqueIdentifier > lastID) lastID = NC.GetUniqueIdentifier;
                 dest.NetComponents.Add(NetworkComponent.Clone(NC));
             }
             //dest.NetTests
@@ -121,6 +125,9 @@ namespace EduNetworkBuilder
             dest.NetMessage = new LanguageStrings(source.NetMessage);
             dest.WhatFrom = source.WhatFrom; //We remember the schoolwork class we came from.
             dest.PuzzleIsSolved = source.PuzzleIsSolved;
+            //In case the number was incorrect.  Fix it.
+            if (lastID >= dest.UniqueIdentifier) dest.UniqueIdentifier = lastID + 1;
+
         }
 
         public Network Clone()