/**
  * @param srCertificate $certificate
  */
 protected function retryGeneration(srCertificate $certificate)
 {
     $certificate->setStatus(srCertificate::STATUS_NEW);
     $certificate->update();
     ilUtil::sendSuccess($this->pl->txt('msg_retry_generation'), true);
     $this->ctrl->redirect($this, 'index');
 }