Fatal error: Uncaught Doctrine\ORM\ORMInvalidArgumentException: A new entity was found through the relationship 'NumericDataTypes\Entity\NumericDataTypesTimestamp#resource' that was not configured to cascade persist operations for entity: Omeka\Entity\Item@6325. 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 'Omeka\Entity\Resource#__toString()' to get a clue. in /var/www/html/vendor/doctrine/orm/lib/Doctrine/ORM/ORMInvalidArgumentException.php:97
Stack trace:
#0 /var/www/html/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(3521): Doctrine\ORM\ORMInvalidArgumentException::newEntitiesFoundThroughRelationships()
#1 /var/www/html/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(390): Doctrine\ORM\UnitOfWork->assertThatThereAreNoUnintentionallyNonPersistedAssociations()
#2 /var/www/html/vendor/doctrine/orm
in /var/www/html/vendor/doctrine/orm/lib/Doctrine/ORM/ORMInvalidArgumentException.php on line 97