ASP.NET MVC System.Data.Entity.Core.EntityCommandExecutionException

I'm having an issue in Asp.net MVC, I have tried several suggestions and looking over Stack Overflow with no luck.

Here are the codes and details:

Exception :

An exception of type 'System.Data.Entity.Core.EntityCommandExecutionException' occurred in EntityFramework.SqlServer.dll but was not handled in user code

Code:

Controller where it got exception:

    namespace DataCrowds.Controllers
{
    public class MarketplaceController : Controller
    {
        private ApplicationDbContext db = new ApplicationDbContext();

        // GET: Marketplace
        public ActionResult Index()
        { 
            return View();
        }

        public PartialViewResult _SearchDataSets(string keyword)
        {
            System.Threading.Thread.Sleep(2000);
            var data = db.DataSets.Where(f =>
            f.title.Contains(keyword)).ToList();
            return PartialView(data);
        }
    }
}

Inner Exception :

Class=16 ErrorCode=-2146232060 HResult=-2146232060 LineNumber=5 Message=Invalid column name 'ApplicationUser_Id'.

More Details (Image Screenshot)

Code first model:

namespace DataCrowds.Models 
{ 
    public class DataSet 
    { 
        public int Id { get; set; } 
        public string title { get; set; } 
        public string description { get; set; } 
        [NotMapped] 
        public HttpPostedFileBase file { get; set; } 
    } 
}

And yes, I have tried to run migration and update-database. Thx!