Index: src/org/netbeans/modules/web/context/WebContextObject.java
===================================================================
RCS file: /cvs/web/core/src/org/netbeans/modules/web/context/WebContextObject.java,v
--- src/org/netbeans/modules/web/context/WebContextObject.java		1.65
+++ src/org/netbeans/modules/web/context/WebContextObject.java	
@@ -181,1 +181,2 @@ 
-            if (ctxRoot == null || ctxRoot.equals ("")) {
---
+            //handling missing server specific data
+            if (ctxRoot == null) {
@@ -186,0 +187,9 @@ 
+                } else {
+                    setURIParameter (null); //only upgrade from old format once and then reset the old value
+                }
+                setContextPath (sysName);
+            }
+            else if (ctxRoot.equals ("")) {
+                String sysName = getURIParameter ();
+                if (!sysName.equals ("")) {
+                    setURIParameter (null); //only upgrade from old format once and then reset the old value