Warning: Undefined variable $clone

[zonky2]

ErrorException:
Warning: Undefined variable $clone

  at vendor/menatwork/synccto/src/DcGeneral/ActionHandler/SyncEditHandler.php:74
  at MenAtWork\SyncCto\DcGeneral\ActionHandler\SyncEditHandler->process()
     (vendor/contao-community-alliance/dc-general/src/View/ActionHandler/AbstractHandler.php:57)
  at ContaoCommunityAlliance\DcGeneral\View\ActionHandler\AbstractHandler->handleEvent(object(ActionEvent), 'dc-general.action', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/Debug/WrappedListener.php:117)
  at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(ActionEvent), 'dc-general.action', object(TraceableEventDispatcher))
     (vendor/symfony/event-dispatcher/EventDispatcher.php:230)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'dc-general.action', object(ActionEvent))