Object of class AppEntityFournisseurs could not be converted to string – PHP

I have the following error: Object of class AppEntityFournisseurs could not be converted to string I wish that in my order page we can choose a supplier to register in the db page and supplier page in order to associate an order with one or several suppliers I have however used the to_string command well so I do not see where the error is even if it must surely be stupid.
I have try add to_sting command in orders.php and in fournisseurs.php ( fournisseurs = suppliers in french)

I use Symfony and EasyAdmin

OrdersCrudController.php

<?php

namespace AppControllerAdmin;

use AppEntityOrders;
use AppEntityFournisseurs;
use DateTime;
use DoctrineORMEntityManagerInterface;
use EasyCorpBundleEasyAdminBundleConfigCrud;
use EasyCorpBundleEasyAdminBundleControllerAbstractCrudController;
use EasyCorpBundleEasyAdminBundleFieldAssociationField;
use EasyCorpBundleEasyAdminBundleFieldDateTimeField;
use EasyCorpBundleEasyAdminBundleFieldIdField;
use EasyCorpBundleEasyAdminBundleFieldNumberField;
use EasyCorpBundleEasyAdminBundleFieldTextField;
use phpDocumentorReflectionTypesBoolean;

class OrdersCrudController extends AbstractCrudController
{
    public static function getEntityFqcn(): string
    {
        return Orders::class;
        
    }

    public function configureCrud(Crud $crud): Crud
    {
        return $crud
        ->setEntityLabelInPlural('Liste des Commandes');
    }
    public function configureFields(string $pageName): iterable
    {
        return [
            IdField::new('id')->hideOnForm(),
            NumberField::new('numero_cmd'),
            AssociationField::new('fournisseur','name_sct')
            ->setCrudController(FournisseursCrudController::class),
            DateTimeField::new('date_cmd'),
            DateTimeField::new('date_rcp'),
            TextField::new('article'),
            TextField::new('designation'),
            NumberField::new('qte_cmd_uom'),
            NumberField::new('unite_cmd'),
        ];
    }


    
}

FournisseursCrudController.php

<?php

namespace AppControllerAdmin;

use AppEntityFournisseurs;
use EasyCorpBundleEasyAdminBundleConfigCrud;
use EasyCorpBundleEasyAdminBundleControllerAbstractCrudController;
use EasyCorpBundleEasyAdminBundleFieldEmailField;
use EasyCorpBundleEasyAdminBundleFieldIdField;
use EasyCorpBundleEasyAdminBundleFieldTelephoneField;
use EasyCorpBundleEasyAdminBundleFieldTextField;

class FournisseursCrudController extends AbstractCrudController
{
    public static function getEntityFqcn(): string
    {
        return Fournisseurs::class;
        
    }

    public function configureCrud(Crud $crud): Crud
    {
        return $crud
        ->setEntityLabelInPlural('Liste des Fournisseurs');
    }
    
    public function configureFields(string $pageName): iterable
    {
        return [
            IdField::new('id')->hideOnForm(),
            TextField::new('name_sct'),
            TextField::new('rcs'),
            EmailField::new('Email'),
            TelephoneField::new('tel'),
            TextField::new('adresse'),
            TextField::new('cp'),
            TextField::new('ville')->setRequired(true),
            
        ];
    }

    
}

Orders.php

<?php

namespace AppEntity;

use AppRepositoryOrdersRepository;
use AppRepositoryFournisseurRepository;
use DoctrineCommonCollectionsArrayCollection;
use DoctrineCommonCollectionsCollection;
use DoctrineDBALTypesTypes;
use DoctrineORMMapping as ORM;

#[ORMEntity(repositoryClass: OrdersRepository::class)]
class Orders
{
    #[ORMId]
    #[ORMGeneratedValue]
    #[ORMColumn]
    private ?int $id = null;

    #[ORMColumn(length: 255)]
    private ?string $numero_cmd = null;

    #[ORMManyToMany(targetEntity: Fournisseurs::class, inversedBy: 'fournisseurs_orders')]
    private Collection $fournisseur;

    #[ORMColumn(type: Types::DATETIME_MUTABLE)]
    private ?DateTimeInterface $date_cmd = null;

    #[ORMColumn(type: Types::DATETIME_MUTABLE)]
    private ?DateTimeInterface $date_rcp = null;

    #[ORMColumn(length: 255)]
    private ?string $article = null;

    #[ORMColumn(length: 255)]
    private ?string $designation = null;

    #[ORMColumn(length: 255)]
    private ?string $qte_cmd_uom = null;

    #[ORMColumn(length: 255)]
    private ?string $unite_cmd = null;

    

    public function __construct()
    {
        $this->fournisseur = new ArrayCollection();
    }

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

    public function getNumeroCmd(): ?string
    {
        return $this->numero_cmd;
    }

    public function setNumeroCmd(string $numero_cmd): self
    {
        $this->numero_cmd = $numero_cmd;

        return $this;
    }

    /**
     * @return Collection<int, Fournisseurs>
     */
    public function getFournisseur(): Collection
    {
        return $this->fournisseur;
    }

    public function addFournisseur(Fournisseurs $fournisseur): self
    {
        if (!$this->fournisseur->contains($fournisseur)) {
            $this->fournisseur->add($fournisseur);
        }

        return $this;
    }

    public function removeFournisseur(Fournisseurs $fournisseur): self
    {
        $this->fournisseur->removeElement($fournisseur);

        return $this;
    }

    public function getDateCmd(): ?DateTimeInterface
    {
        return $this->date_cmd;
    }

    public function setDateCmd(DateTimeInterface $date_cmd): self
    {
        $this->date_cmd = $date_cmd;

        return $this;
    }

    public function getDateRcp(): ?DateTimeInterface
    {
        return $this->date_rcp;
    }

    public function setDateRcp(DateTimeInterface $date_rcp): self
    {
        $this->date_rcp = $date_rcp;

        return $this;
    }

    public function getArticle(): ?string
    {
        return $this->article;
    }

    public function setArticle(string $article): self
    {
        $this->article = $article;

        return $this;
    }

    public function getDesignation(): ?string
    {
        return $this->designation;
    }

    public function setDesignation(string $designation): self
    {
        $this->designation = $designation;

        return $this;
    }

    public function getQteCmdUom(): ?string
    {
        return $this->qte_cmd_uom;
    }

    public function setQteCmdUom(string $qte_cmd_uom): self
    {
        $this->qte_cmd_uom = $qte_cmd_uom;

        return $this;
    }

    public function getUniteCmd(): ?string
    {
        return $this->unite_cmd;
    }

    public function setUniteCmd(string $unite_cmd): self
    {
        $this->unite_cmd = $unite_cmd;

        return $this; 
    }

  
    public function __toString()
    {
        return $this->sct_name;
    }
   
}

Fournisseurs.php

<?php

namespace AppEntity;

use AppRepositoryFournisseursRepository;
use DoctrineCommonCollectionsArrayCollection;
use DoctrineCommonCollectionsCollection;
use DoctrineORMMapping as ORM;

#[ORMEntity(repositoryClass: FournisseursRepository::class)]
class Fournisseurs
{
    #[ORMId]
    #[ORMGeneratedValue]
    #[ORMColumn]
    private ?int $id = null;

    #[ORMColumn(length: 255)]
    private ?string $name_sct = null;

    #[ORMColumn(length: 255)]
    private ?string $rcs = null;

    #[ORMColumn(length: 255)]
    private ?string $adresse = null;

    #[ORMColumn(length: 255)]
    private ?string $email = null;

    #[ORMColumn(length: 8)]
    private ?string $cp = null;

    #[ORMColumn(length: 8)]
    private ?string $tel = null;

    #[ORMOneToMany(mappedBy: 'fournisseur_name', targetEntity: Orders::class)]
    private Collection $orders;

    #[ORMManyToMany(targetEntity: Orders::class, mappedBy: 'fournisseur_name')]
    private Collection $orders_obj;

    #[ORMManyToMany(targetEntity: Orders::class, mappedBy: 'fournisseur')]
    private Collection $fournisseurs_orders;

    #[ORMColumn(length: 255)]
    private ?string $Ville = null;

    public function __construct()
    {
        $this->orders = new ArrayCollection();
        $this->orders_obj = new ArrayCollection();
        $this->fournisseurs_orders = new ArrayCollection();
    }

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

    public function getNameSct(): ?string
    {
        return $this->name_sct;
    }

    public function setNameSct(string $name_sct): self
    {
        $this->name_sct = $name_sct;

        return $this;
    }

    public function getRcs(): ?string
    {
        return $this->rcs;
    }

    public function setRcs(string $rcs): self
    {
        $this->rcs = $rcs;

        return $this;
    }

    public function getAdresse(): ?string
    {
        return $this->adresse;
    }

    public function setAdresse(string $adresse): self
    {
        $this->adresse = $adresse;

        return $this;
    }

    public function getEmail(): ?string
    {
        return $this->email;
    }

    public function setEmail(string $email): self
    {
        $this->email = $email;

        return $this;
    }

    public function getCp(): ?string
    {
        return $this->cp;
    }

    public function setCp(string $cp): self
    {
        $this->cp = $cp;

        return $this;
    }

    public function getTel(): ?string
    {
        return $this->tel;
    }

    public function setTel(string $tel): self
    {
        $this->tel = $tel;

        return $this;
    }

    /**
     * @return Collection<int, Orders>
     */
    public function getOrders(): Collection
    {
        return $this->orders;
    }

    public function addOrder(Orders $order): self
    {
        if (!$this->orders->contains($order)) {
            $this->orders->add($order);
            $order->setFournisseurName($this);
        }

        return $this;
    }

    public function removeOrder(Orders $order): self
    {
        if ($this->orders->removeElement($order)) {
            // set the owning side to null (unless already changed)
            if ($order->getFournisseurName() === $this) {
                $order->setFournisseurName(null);
            }
        }

        return $this;
    }

    /**
     * @return Collection<int, Orders>
     */
    public function getOrdersObj(): Collection
    {
        return $this->orders_obj;
    }

    public function addOrdersObj(Orders $ordersObj): self
    {
        if (!$this->orders_obj->contains($ordersObj)) {
            $this->orders_obj->add($ordersObj);
            $ordersObj->addFournisseurName($this);
        }

        return $this;
    }

    public function removeOrdersObj(Orders $ordersObj): self
    {
        if ($this->orders_obj->removeElement($ordersObj)) {
            $ordersObj->removeFournisseurName($this);
        }

        return $this;
    }

    /**
     * @return Collection<int, Orders>
     */
    public function getFournisseursOrders(): Collection
    {
        return $this->fournisseurs_orders;
    }

    public function addFournisseursOrder(Orders $fournisseursOrder): self
    {
        if (!$this->fournisseurs_orders->contains($fournisseursOrder)) {
            $this->fournisseurs_orders->add($fournisseursOrder);
            $fournisseursOrder->addFournisseur($this);
        }

        return $this;
    }

    public function removeFournisseursOrder(Orders $fournisseursOrder): self
    {
        if ($this->fournisseurs_orders->removeElement($fournisseursOrder)) {
            $fournisseursOrder->removeFournisseur($this);
        }

        return $this;
    }

    public function getVille(): ?string
    {
        return $this->Ville;
    }

    public function setVille(string $Ville): self
    {
        $this->Ville = $Ville;

        return $this;
    }

}