安装fluentvalidation.webapi后无法命中重复的控制器路由？

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}",
    defaults: new { id = RouteParameter.Optional }
);

config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "api/{controller}/{id}",
    defaults: new { id = RouteParameter.Optional }
);

[RoutePrefix("api/products")]
public class ProductsController : ApiController
{
    [Route("")]
    public IHttpActionResult GetProducts()
    {
        // Your code here
    }

    [Route("{id}")]
    public IHttpActionResult GetProduct(int id)
    {
        // Your code here
    }
}

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();
    GlobalConfiguration.Configure(WebApiConfig.Register);
    FluentValidationModelValidatorProvider.Configure();
}

namespace MyNamespace.Controllers
{
    [RoutePrefix("api/products")]
    public class ProductsController : ApiController
    {
        // Your code here
    }
}

config.Services.Replace(typeof(IHttpActionInvoker), new HttpControllerDispatcher(config));
config.MessageHandlers.Add(new LoggingMessageHandler());