diff --git a/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs b/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
index 2911bed8..6f0e081f 100644
--- a/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
@@ -669,8 +669,15 @@ namespace VEPROMS.CSLA.Library
 			ConvertListToDictionary();
 			string key = itemID.ToString();
 			if (_CacheByPrimaryKey.ContainsKey(key))
-				foreach (ItemInfo item in _CacheByPrimaryKey[key])
+			{
+				// Create a temporary list to process cache entries then use
+				// the temporary list which may have a side effect on the cache entries,
+				// thus the need for the temporary list.
+				List<ItemInfo> myCache = new List<ItemInfo>();
+				foreach (ItemInfo item in _CacheByPrimaryKey[key]) myCache.Add(item);
+				foreach (ItemInfo item in myCache)
 					item.OnOrdinalChange();
+			}
 		}
 		public bool IsFirstSubStep
 		{