Duplicate error messages in DataAnnotations attributes

My WebApiConfig looks like this:

public static void Register(HttpConfiguration config){

...

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

FluentValidationModelValidatorProvider.Configure(config);

My controller and model look like this:

public class Model
{
    [Range(0, 2)]
    public int Amount { get; set; }
}

[HttpPost]
public IHttpActionResult Create(Model model)
{
    return Ok(model);
}

When the validation is finished, I end up with two Errors in my ModelState.Values for the Amount property. I have no any other custom validators, just FV enabled. Duplicate error messages also appear when using custom validation in a standard way (inheriting from ValidationAttribute).

Sorry if this issue is duplicated, but I cannot see anything related to it.

[JeremySkinner]

I’ve pushed out 8.2.3 with the fix - it should appear in Nuget shortly. Could you give it a try and let me know if it looks ok for you?

Thanks for the help tracking this down.

[JeremySkinner]

Thanks - I’ll let you know what I find.