orchardcms - Orchard CMS ユーザーの作成時にエントリが重複する

Question

私はこれについて頭を悩ませてきました。このコードを見てください。このコードは顧客コントローラーにあります。

    [HttpPost]
    [Themed]
    public ActionResult Register(string email, string password, string confirmPassword, Gender gender, string givenName, string familyName, string insertion, DateTime birthDate) {

        ViewData["PasswordLength"] = MinPasswordLength;
        var shape = _orchardServices.New.Register();

        //1. Initialize new content of customer contenttype
        var customer = _orchardServices.ContentManager.New("Customer");

        if (customer != null) {
            //2. Define the parts that need to be filled
            var userPart = customer.As<UserPart>();
            var customerPart = customer.As<CustomerPart>();

            //3. Let's validate first if the user can be created
            if (userPart!=null) {
                //shape.Customer = _orchardServices.ContentManager.UpdateEditor(customer, this);
                if (!ModelState.IsValid)
                {
                    _orchardServices.TransactionManager.Cancel();
                    return new ShapeResult(this, shape);
                }

                //4. Now validate the user credentials.
                if (ValidateRegistration(email, password, confirmPassword)) {
                    //Now create the actual customer.
                    userPart.UserName = email;
                    userPart.Email = email;
                    userPart.NormalizedUserName = email.ToLowerInvariant();
                    userPart.Record.HashAlgorithm = "SHA1";
                    userPart.Record.RegistrationStatus = UserStatus.Approved;
                    userPart.Record.EmailStatus = UserStatus.Approved;

                    customerPart.CreatedAt = DateTime.UtcNow;
                    customerPart.LastLogonAt = DateTime.UtcNow;
                    _membershipService.SetPassword(userPart, password);

                    var user = customerPart.User;
                    _authenticationService.SignIn(user, false /* createPersistentCookie */);
                    return Redirect("~/");
                }
            }

        }

このコードを実行すると、データベースに UserPart の 2 つのエントリが作成されます。関連する CustomerPart があるものとないもの。