diff --git a/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/GrantSession.pm b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/GrantSession.pm
index c29be921d..1685c43f9 100644
--- a/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/GrantSession.pm
+++ b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Plugins/GrantSession.pm
@@ -40,6 +40,7 @@ sub grantSession {
     foreach ( sort sortByComment keys %{ $self->rules } ) {
         $self->logger->debug("Grant session condition \"$_\"");
         unless ( $self->rules->{$_}->( $req->sessionInfo ) ) {
+            $req->userData({});
             $self->userLogger->error( 'User '
                   . $req->user
                   . " was not granted to open session (rule $_)" );