diff --git a/model/Service/ConcurringSessionService.php b/model/Service/ConcurringSessionService.php
index b6554442a..4419ef5c9 100644
--- a/model/Service/ConcurringSessionService.php
+++ b/model/Service/ConcurringSessionService.php
@@ -23,7 +23,6 @@
 namespace oat\taoQtiTest\model\Service;
 
 use common_Exception;
-use core_kernel_classes_Resource;
 use oat\generis\model\data\Ontology;
 use oat\oatbox\service\ServiceManager;
 use oat\tao\model\featureFlag\FeatureFlagCheckerInterface;