OneToOne connection does not work (Doctrine v2.5.14). What could be the problem?

Question

symfony

There are 2 entities

/**
 * Catalog
 *
 * @ORM\Table(name="catalog", indexes={@ORM\Index(name="position_idx", columns={"position"})})
 * @DoctrineAssert\UniqueEntity(fields="url", message="URL должен быть уникальным")
 * @ORM\Entity
 */
class Catalog
{
    /**
     * @var CatalogTemplate
     *
     * @ORM\OneToOne(targetEntity="CatalogTemplate", mappedBy="catalog", cascade={"persist"})
     **/
    private $template;
}

and

/**
 * CatalogTemplate
 * @ORM\Entity
 * @ORM\Table(name="catalog_template")
 */
class CatalogTemplate
{
/**
     * @ORM\OneToOne(targetEntity="Catalog", inversedBy="template")
     * @ORM\JoinColumn(name="catalog_id", referencedColumnName="id")
     */
    private $catalog;
}

In a DB everything was updated there were communications, tables, fields.
Manually created 1 record in the tables, but when I write it
$catalog->getTemplate()->getId();
gives an error
Call to a member function setValue() on null
It is interesting that the same code works on the local machine, on the server it gives an error. The versions of the doctrine are identical.

Answer 1

MAIN rule when updating the database, do not forget to add --env=prod
for the command php bin/console doctrine:cache:clear-metadata =)