Fatal error: Uncaught Doctrine\ORM\ORMInvalidArgumentException: A new entity was found through the relationship 'Windu\CommonBundle\Entity\PageMeta#page' that was not configured to cascade persist operations for entity: Windu\CommonBundle\Entity\Page@000000000713463f000000006772841f. 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"}). If you cannot find out which entity causes the problem implement 'Windu\CommonBundle\Entity\Page#__toString()' to get a clue. in /www/fundacjaave_www/www/fundacjaave.pl/vendor/doctrine/orm/lib/Doctrine/ORM/ORMInvalidArgumentException.php:102 Stack trace: #0 /www/fundacjaave_www/www/fundacjaave.pl/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(3443): Doctrine\ORM\ORMInvalidArgumentException::newEntitiesFoundThroughRelationships(Array) #1 /www/fundacjaave_www/www/fundacjaave.pl/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(362): Doctrine in /www/fundacjaave_www/www/fundacjaave.pl/vendor/doctrine/orm/lib/Doctrine/ORM/ORMInvalidArgumentException.php on line 102