Symfony 5 : Column 'image_name' cannot be null

Bonjour,

Je ne comprends pas d'où vient cette erreur alors je m'adresse à vous.

J'ai suivi la doc de Vich Uploader comme il se doit et j'ai ce message d'erreur lors de l'upload d'image :

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'image_name' cannot be null

Le nom de l'image n'est pas sauvegardé, et je ne comprends pas pourquoi !

Voici mon code :

vich_uploader.yaml

vich_uploader:
    db_driver: orm

    mappings:
       news_image:
           uri_prefix: /img/uploads/news
           upload_destination: '%kernel.project_dir%/public/img/uploads/news'
           namer: Vich\UploaderBundle\Naming\SmartUniqueNamer

           delete_on_update: true
           delete_on_remove: true

News.php :

<?php

namespace App\Entity;

use DateTime;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\File;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Vich\UploaderBundle\Mapping\Annotation as Vich;

/**
 * @ORM\Entity(repositoryClass="App\Repository\NewsRepository")
 * @Vich\Uploadable
 */
class News
{
    /**
     * @ORM\Id()
     * @ORM\GeneratedValue()
     * @ORM\Column(type="integer")
     */
    private $id;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $title;

    /**
     * @ORM\Column(type="text")
     */
    private $content;

    /**
     * @ORM\ManyToOne(targetEntity="App\Entity\User", inversedBy="news")
     * @ORM\JoinColumn(nullable=false)
     */
    private $author;

    /**
     * @ORM\Column(type="string")
     */
    private $imageName;

    /**
     * @Vich\UploadableField(mapping="news_image", fileNameProperty="imageName")
     */
    private $imageFile;

    /**
     * @ORM\Column(type="string", length=255)
     */
    private $featured;

    /**
     * @ORM\Column(type="datetime")
     */
    private $createdAt;

    /**
     * @ORM\Column(type="datetime", nullable=true)
     */
    private $updatedAt;

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getTitle(): ?string
    {
        return $this->title;
    }

    public function setTitle(string $title): self
    {
        $this->title = $title;

        return $this;
    }

    public function getContent(): ?string
    {
        return $this->content;
    }

    public function setContent(string $content): self
    {
        $this->content = $content;

        return $this;
    }

    public function getAuthor(): ?User
    {
        return $this->author;
    }

    public function setAuthor(?User $author): self
    {
        $this->author = $author;

        return $this;
    }

    public function setImageName(?string $imageName): void
    {
        $this->imageName = $imageName;
    }

    public function getImageName(): ?string
    {
        return $this->imageName;
    }

    public function getImageFile(): ?File
    {
        return $this->imageFile;
    }

    public function setImageFile(?File $imageFile = null): self
    {
        $this->imageFile = $imageFile;

        if ($this->imageFile instanceof UploadedFile) {
            $this->updatedAt = new DateTime('now');
        }

        return $this;
    }

    public function getFeatured(): ?string
    {
        return $this->featured;
    }

    public function setFeatured(string $featured): self
    {
        $this->featured = $featured;

        return $this;
    }

    public function getCreatedAt(): ?\DateTimeInterface
    {
        return $this->createdAt;
    }

    public function setCreatedAt(\DateTimeInterface $createdAt): self
    {
        $this->createdAt = $createdAt;

        return $this;
    }

    public function getUpdatedAt(): ?\DateTimeInterface
    {
        return $this->updatedAt;
    }

    public function setUpdatedAt(?\DateTimeInterface $updatedAt): self
    {
        $this->updatedAt = $updatedAt;

        return $this;
    }
}

NewsType.php :

<?php

namespace App\Form;

use App\Entity\News;
use Symfony\Component\Form\AbstractType;
use FOS\CKEditorBundle\Form\Type\CKEditorType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\Extension\Core\Type\FileType;

class NewsType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title', TextType::class, [
                'label' => 'Titre *',
            ])
            ->add('content', CKEditorType::class, [
                'label' => 'Contenu *',
                'attr' => ['rows' => '8'],
            ])
            ->add('imageFile', FileType::class, [
                'label' => 'Ajouter une image *',
                'attr' => ['lang' => 'fr'],
                'required' => true
            ])
            ->add('featured', ChoiceType::class, [
                'label' => 'A la Une *',
                'choices' => ['Oui' => 'oui', 'Non' => 'non'],
            ])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => News::class,
        ]);
    }
}

AdminNewsController.php :

/**
     * @Route("/admin/news/create", name="create_news")
     */
    public function create(Request $request, EntityManagerInterface $em)
    {
        $news = new News();
        $form = $this->createForm(NewsType::class, $news);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $news->setAuthor($this->getUser());
            $news->setCreatedAt(new DateTime('now'));
            $em->persist($news);
            $em->flush();

            return $this->redirectToRoute('admin_news');
        }

        return $this->render('admin_news/create.html.twig', [
            'form' => $form->createView()

create.html.twig :

{% block body %}
    {{ form_start(form) }}
        {{ form_widget(form) }}
        <input class="btn btn-primary text-uppercase" type="submit" value="Ajouter">
    {{ form_end(form) }}
{% endblock %}

Merci pour votre aide !