diff --git a/src/org/gcube/application/framework/core/session/ASLSession.java b/src/org/gcube/application/framework/core/session/ASLSession.java
index a46b777..0bf89e5 100644
--- a/src/org/gcube/application/framework/core/session/ASLSession.java
+++ b/src/org/gcube/application/framework/core/session/ASLSession.java
@@ -57,7 +57,7 @@ public class ASLSession{
 
 	private void initializeAttributes() {
 		for (String key:innerSession.keySet()) {
-			if (key.equals("collectionsPresentableFields")) {
+			if (key.equals("collectionsPresentableFields") || key.equals(SessionConstants.collectionsHierarchy)) {
 				innerSession.remove(key);
 				break;
 			}