Symfony 4 - Can't create Entity - symfony

Question

I'm using Sonata Admin for the first time, I followed doc online and my admin works well, except I have an error when I try to create elements via my admin:
Failed to create object: App\Entity\HomeBlockElement
I have my HomeBlockElement
<?php
namespace App\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity(repositoryClass="App\Repository\HomeBlockElementRepository")
* #ORM\Table(name="home_block_element")
*/
class HomeBlockElement
{
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(name="home_element_id",type="integer")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="home_element_title", type="string", length=255)
*/
protected $title;
/**
* #var string
*
* #ORM\Column(name="home_element_text_link", type="string", length=255)
*/
protected $textLink;
/**
* #var string
*
* #ORM\Column(name="home_element_shopping_link", type="string", length=255)
*/
protected $shoppingLink;
/**
* #var string
*
* #ORM\Column(name="home_element_marketing_etiquette", type="string", length=255)
*/
protected $marketingEtiquette;
/**
* #var string
*
* #ORM\Column(name="home_element_media", type="text")
*/
protected $media;
/**
* #var bool
*
* #ORM\Column(name="home_element_published", type="boolean")
*/
protected $published = false;
public function getId(): ?int
{
return $this->id;
}
/**
* #return string
*/
public function getTitle(): ?string
{
return $this->title;
}
/**
* #param string $title
* #return HomeBlockElement
*/
public function setTitle(?string $title): HomeBlockElement
{
$this->title = $title;
return $this;
}
/**
* #return string
*/
public function getTextLink(): ?string
{
return $this->textLink;
}
/**
* #param string $textLink
* #return HomeBlockElement
*/
public function setTextLink(?string $textLink): HomeBlockElement
{
$this->textLink = $textLink;
return $this;
}
/**
* #return string
*/
public function getShoppingLink(): ?string
{
return $this->shoppingLink;
}
/**
* #param string $shoppingLink
* #return HomeBlockElement
*/
public function setShoppingLink(?string $shoppingLink): HomeBlockElement
{
$this->shoppingLink = $shoppingLink;
return $this;
}
/**
* #return string
*/
public function getMarketingEtiquette(): ?string
{
return $this->marketingEtiquette;
}
/**
* #param string $categoryLink
* #return HomeBlockElement
*/
public function setMarketingEtiquette(?string $marketingEtiquette): HomeBlockElement
{
$this->marketingEtiquette = $marketingEtiquette;
return $this;
}
/**
* #return bool
*/
public function isPublished(): bool
{
return $this->published;
}
/**
* #param bool $published
* #return Page
*/
public function setPublished(bool $published): HomeBlockElement
{
$this->published = $published;
return $this;
}
}
And my HomeBlockElementAdmin:
<?php
namespace App\Admin;
use App\Entity\Page;
use FOS\CKEditorBundle\Form\Type\CKEditorType;
use Sonata\AdminBundle\Admin\AbstractAdmin;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Route\RouteCollection;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
final class HomeBlockElementAdmin extends AbstractAdmin
{
protected $datagridValues = array(
'_sort_order' => 'ASC',
'_sort_by' => 'title',
);
/**
* #param $object
* #return string|null
*/
public function toString($object): ?string
{
return $object instanceof Page && $object->getTitle()
? $object->getTitle()
: 'Nouveau bloc élément';
}
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper
->with('Contenu')
->add('published', CheckboxType::class, ['required' => false, 'label' => 'Publier'])
->add('title', TextType::class, ['required' => true, 'label' => 'Titre'])
->add('marketingEtiquette', TextType::class, ['required' => false, 'label' => 'Etiquette Marketing'])
->add('textLink', TextType::class, ['required' => true, 'label' => 'Texte'])
->add('shoppinglink', TextType::class, ['required' => true, 'label' => 'Lien'])
->end();
}
protected function configureListFields(ListMapper $listMapper)
{
unset($this->listModes['mosaic']);
$listMapper
->addIdentifier('title')
->addIdentifier('marketingEtiquette')
->addIdentifier('textLink')
->addIdentifier('shoppinglink')
->addIdentifier('published')
;
}
protected function configureDatagridFilters(DatagridMapper $datagridMapper)
{
$datagridMapper
->add('title')
->add('marketingEtiquette')
->add('textLink')
->add('shoppinglink')
->add('published');
}
/**
* #param RouteCollection $collection
*/
protected function configureRoutes(RouteCollection $collection)
{
$collection
->remove('delete')
//->remove('create')
->add('move', $this->getRouterIdParameter() . '/move/{position}');
}
}
I then defined this in my services.yaml
admin.element:
class: App\Admin\HomeBlockElementAdmin
arguments: [~, App\Entity\HomeBlockElement, ~]
tags:
- { name: sonata.admin, manager_type: orm, label: 'Element blocs', group: 'app.admin.group.home' }
I've updated the data base with php bin/console doctrine:schema:update to make it match with my code and everything worked fine.From what I saw on the Internet, the error is related to SQL but
I can't see where the error comes from.
In the breadrcumb from the error I can see:
PDOException > PDOException > NotNullConstraintViolationException > ModelManagerException
So the error is because something is null when it shouldn't? But the only thing that is required is the id, and it should be generated automatically... I don't know what to do