为什么我不能从同一个对象绑定到前台服务两次？

public class MyServiceConnection implements ServiceConnection {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        // 处理服务连接
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        // 处理服务断开
    }
}

// 第一次绑定
MyServiceConnection connection1 = new MyServiceConnection();
bindService(new Intent(this, MyForegroundService.class), connection1, Context.BIND_AUTO_CREATE);

// 第二次绑定
MyServiceConnection connection2 = new MyServiceConnection();
bindService(new Intent(this, MyForegroundService.class), connection2, Context.BIND_AUTO_CREATE);

public class ServiceManager {
    private static ServiceManager instance;
    private MyServiceConnection connection;

    private ServiceManager() {
        connection = new MyServiceConnection();
    }

    public static synchronized ServiceManager getInstance() {
        if (instance == null) {
            instance = new ServiceManager();
        }
        return instance;
    }

    public void bindService(Context context) {
        context.bindService(new Intent(context, MyForegroundService.class), connection, Context.BIND_AUTO_CREATE);
    }

    public void unbindService(Context context) {
        context.unbindService(connection);
    }
}

// 使用单例模式进行绑定
ServiceManager.getInstance().bindService(this);