diff --git a/src/main/java/org/gcube/portal/custom/scopemanager/scopehelper/ScopeHelper.java b/src/main/java/org/gcube/portal/custom/scopemanager/scopehelper/ScopeHelper.java
index 7a69ad9..2aa4df2 100644
--- a/src/main/java/org/gcube/portal/custom/scopemanager/scopehelper/ScopeHelper.java
+++ b/src/main/java/org/gcube/portal/custom/scopemanager/scopehelper/ScopeHelper.java
@@ -159,6 +159,7 @@ public class ScopeHelper {
 		userRoles.add(DEFAULT_ROLE);
 		if (username.compareTo("lucio.lelii")==0)
 			userRoles.add("VRE-Manager");
+		session.setSecurityToken(null);
 		String token = authorizationService().build().generate(session.getUsername(), userRoles);
 		_log.debug("received token: "+token);
 		session.setSecurityToken(token);