为什么当唯一的 Id 传递是 int 时，这会返回我“字符串给定”

问：

我是symfony的新手，需要帮助

当我运行“console debug：event”时，我收到以下错误消息：

 App\EventListener\ReservationEventSubscriber::__construct(): Argument #3 ($id) must be of type int, string given, called in /Applica  
  tions/MAMP/htdocs/E-STock/E-STock_v6/var/cache/dev/ContainerTiaj2qn/getReservationEventSubscriberService.php on line 22

问题是我不明白如何解决它。 即使我也不了解这个问题^^

这是我的代码：

ReservationEventSubscriber：

class ReservationEventSubscriber implements EventSubscriberInterface
{

    private $manager;
    private int $id;


    public function __construct(EntityManagerInterface $manager, TokenStorageInterface $tokenStorage, int $pieceId)
    {
        
        $this->manager = $manager;
        $this->tokenStorage = $tokenStorage;
        $this->id = $pieceId;
    }

我已经在'service.yaml'上绑定了我的“pieceId”

parameters:
      id: 'secret'

services:
    # default configuration for services in *this* file
    _defaults:
        autowire: true      # Automatically injects dependencies in your services.
        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
        bind:
           int $pieceId: '%id%'

    # makes classes in src/ available to be used as services
    # this creates a service per class whose id is the fully-qualified class name
    App\:
        resource: '../src/'
        exclude:
            - '../src/DependencyInjection/'
            - '../src/Entity/'
            - '../src/Kernel.php'