Symfony version(s) affected

6.3.9, 6.4.0

Description

As of Symfony/var-exporter 6.3.9 I've got this error message on multiple places in my application:

Cannot access uninitialized non-nullable property App\Entity\User::$notifications by reference

It happens when I get an Organization from Doctrine.

My entity:

#[\ApiPlatform\Metadata\ApiResource(
    // ...
)]
#[\Doctrine\ORM\Mapping\Entity(UserRepository::class)]
class User
{
    #[ManyToOne(Organisation::class, cascade: ['persist'], inversedBy: 'users')]
    #[Gedmo\Versioned]
    private ?Organisation $organisation = null;

    #[OneToMany('user', targetEntity: \App\Entity\User\Notification::class)]
    private Collection $notifications;
    public function __construct()
    {
        $this->notifications = new ArrayCollection();
    }
}

How to reproduce

I'll create a reproducer if necessary, but before I do I'd like to hear some feedback. Maybe it's a simple mistake I've made, or someone has some suggestions how to create a reproducer.

Possible Solution

No response

Additional Context

No response