Editer un formulaire comportant un CollectionType

Bonjour à tous,

Lors d'une édition d"une recette, j'ai cette erreur :

Symfony\Bridge\Doctrine\Form\ChoiceList\IdReader::getIdValue(): Argument #1 ($object) must be of type ?object, string given, called in /home/julien/Documents/Dev/Newdevcreator/cook-book/vendor/symfony/form/ChoiceList/ArrayChoiceList.php on line 181

RecipeType

<?php

namespace App\Form;

use App\Entity\Recipe;
use App\Entity\Category;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\CollectionType;
use Symfony\Component\Form\FormBuilderInterface;
use Vich\UploaderBundle\Form\Type\VichImageType;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
use Symfony\Component\Validator\Constraints\Image;
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\IntegerType;

class RecipeType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        $builder
            ->add('ingredient', CollectionType::class, [
                'entry_type' => IngredientType::class,
                'label' => 'Ingrédients',
                'entry_options' => ['label' => false],
                'allow_add' => true,
                'allow_delete' => true,
                'by_reference' => false,
            ])
            ->add('recipeStep', CollectionType::class, [
                'entry_type' => RecipeStepType::class,
                'label' => 'Etapes',
                'entry_options' => ['label' => false],
                'allow_add' => true,
                'allow_delete' => true,
                'by_reference' => false,
            ])
            ->add('title', TextType::class, [
                'attr' => [
                    'placeholder' => 'Exemple : Poulet au citron',
                    'autocomplete' => 'off',
                ],
                'label' => 'Titre de la recette',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'required'   => true,
            ])
            ->add('difficulty', ChoiceType::class, [
                'label' => 'Difficulté de la recette',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'choices' => [
                    'Simplissime' => Recipe::SIMPLE,
                    'Facile' => Recipe::EASY,
                    'Moyenne' => Recipe::AVERAGE,
                    'Difficile' => Recipe::DIFFICULT,
                    'Niveau grand chef' => Recipe::LEVEL_GRAND_CHEF
                ]
            ])
            ->add('personCount', IntegerType::class, [
                'attr' => [
                    'placeholder' => 'Exemple : 4',
                    'autocomplete' => 'off',
                ],
                'label' => 'Pour combien de personnes ?',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'required'   => true,
            ])
            ->add('timeCount', IntegerType::class, [
                'attr' => [
                    'placeholder' => 'Exemple : 4',
                    'autocomplete' => 'off',
                ],
                'label' => 'Temps total de la recette (en minutes)',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'required'   => true,
            ])
            ->add('imageFile', VichImageType::class, [
                'label' => 'Image de la recette',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'attr' => [
                    'class' => 'filepond'
                ],
                'help' => 'Formats acceptés : jpg, png. Taille maximale : 5Mo',
                'required' => false,
                'allow_delete' => false,
                'download_uri' => false,
                'image_uri' => false,
                'asset_helper' => false,
                'constraints' => [
                    new Image([
                        'maxSize' => '5M',
                        'mimeTypes' => [
                            'image/jpeg', 'image/png', 'image/jpg'
                        ],
                        'mimeTypesMessage' => 'Veuillez télécharger un document image valide (jpg, jpeg, png)',
                    ])
                ],
            ])
            ->add('categories', CategoryAutocompleteField::class, [
                'label' => 'Catégorie de la recette',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'required'   => true,
            ]);
    }

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

CategoryAutocompleteField

$resolver->setDefaults([
            'class' => Category::class,
            'placeholder' => 'Choisissez une ou plusieurs categories',
            'choice_label' => 'title',
            'label' => 'Choix des catégories',
            'multiple' => true,
            'required' => false,
            'autocomplete' => true,
            'attr' => [
                'class' => 'min-widt'
            ],
            'query_builder' => function (CategoryRepository $categoryRepository) {
                return $categoryRepository->createQueryBuilder('categories');
            },
            // 'security' => 'ROLE_SOMETHING',
        ]);

IngredientType

$builder
        ->add('name', IngredientAutocompleteField::class, [
            'label' => 'Ingrédient',
            'label_attr' => [
                'class' => 'is-input-required'
            ],
            'required'   => true,
            'multiple'   => false,
        ])
            ->add('measurement', MeasurementType::class, [
                'mapped' => false,
                'label' => false,
            ]);

IngredientAutocompleteField

$resolver->setDefaults([
            'class' => Ingredient::class,
            'placeholder' => 'Choose a Ingredient',
            'choice_label' => 'name',
            'label' => 'Choix des ingrédients',
            'multiple' => true,
            'required' => false,
            'autocomplete' => true,
            'attr' => [
                'class' => 'min-widt'
            ],
            'query_builder' => function (IngredientRepository $ingredientRepository) {
                return $ingredientRepository->createQueryBuilder('ingredient');
            },
            // 'security' => 'ROLE_SOMETHING',
        ]);

MeasurementType

$builder
            ->add('quantity', IntegerType::class, [
                'label' => 'Quantité',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
            ])
            ->add('unity', ChoiceType::class, [
                'label' => 'Unité',
                'label_attr' => [
                    'class' => 'is-input-required'
                ],
                'choices' => [
                    'Pièce(s)' => Measurement::PIECE,
                    'ml' => Measurement::LITER,
                    'g' => Measurement::MASS
                ]
            ]);

Ce que je veux

Il semblerait que le collectionType ou le autocompleteField ne renvoient pas l'objet, mais une chaine de caractères.
Je ne vois rien dans la doc à ce sujet.
si j'enlève "ingredient", "recipeStep" et "categories", mon formulaire marche.