Код не работает должным образом

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The mapping of CLR type to EDM type is ambiguous because multiple CLR types match the EDM type 'UserProfile'. Previously found CLR type 'javascript.UserProfile', newly found CLR type 'javascript.Models.UserProfile'

What I have tried:

public ActionResult Login(UserProfile objUser)
        {
            if (ModelState.IsValid)
            {
                using (DB_Entities db = new DB_Entities())
                {
                    var obj = db.UserProfiles.Where(a => a.UserName.Equals(objUser.UserName) && a.Password.Equals(objUser.Password)).FirstOrDefault();
                    if (obj != null)
                    {
                        Session["UserID"] = obj.UserId.ToString();
                        Session["UserName"] = obj.UserName.ToString();
                        return RedirectToAction("UserDashBoard");
                    }
                }
            }
            return View(objUser);
        }

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