A new entity was found through the relationship 'ActivityJournalBundle\Entity\UserActivity#user' that was not configured to cascade persist operations for entity: Igor. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example
@ManyToOne(..,cascade={"persist"}).","exception" => Symfony\Component\Messenger\Exception\HandlerFailedException { …}]