diff --git a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVWorkSpaceSelectionCard.java b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVWorkSpaceSelectionCard.java
index 14c08ba..1642300 100644
--- a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVWorkSpaceSelectionCard.java
+++ b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVWorkSpaceSelectionCard.java
@@ -112,6 +112,12 @@ public class CSVWorkSpaceSelectionCard extends WizardCard {
 				Log.debug("WorkspaceExplorer Aborted");
 
 			}
+
+			@Override
+			public void onNotValidSelection() {
+				thisCard.exportSession.setItemId(null);
+				
+			}
 		};
 
 		wpanel.addWorkspaceExplorerSelectNotificationListener(handler);