/**
  * @param \TYPO3\Sessions\Domain\Model\AcceptedSession $session
  * @validate $session \TYPO3\Sessions\Domain\Validator\SpeakerCollisionValidator
  * @return string
  */
 public function scheduleSessionAction(\TYPO3\Sessions\Domain\Model\AcceptedSession $session)
 {
     // update properties
     $this->acceptedSessionRepository->update($session);
     /** @var PersistenceManager $persistenceManager */
     $persistenceManager = GeneralUtility::makeInstance(PersistenceManager::class);
     $persistenceManager->persistAll();
     // change type manually after extbase updated the object
     /** @var \TYPO3\CMS\Core\Database\DatabaseConnection $db */
     $db = $GLOBALS['TYPO3_DB'];
     $res = $db->exec_UPDATEquery('tx_sessions_domain_model_session', 'uid = ' . $session->getUid(), ['type' => ScheduledSession::class]);
     return 'success';
 }