solve db.SaveChanges() exception MVC5

Question

I am using code first approach when call SaveChanges function appears Exception message ,my Code is :

public ActionResult Create(JobSeekerMore AllJobSeekerInfos, HttpPostedFileBase[] acadimicCertificate)
    {
        HttpPostedFileBase img;
        JobSeekerInfo jobSeekerInfo = new JobSeekerInfo();
        var userID = User.Identity.GetUserId();
        string path;
        string fileName;
        int i = 0;
        AcadimicDetail acadimi;
        if (ModelState.IsValid)
        {
            i = 0;
            foreach (AcadimicDetail item in AllJobSeekerInfos.MoreAcadimicDetials)
            {
                acadimi = new AcadimicDetail();
                acadimi = item;
                fileName = userID + "acadimicCertificate";
                acadimi.acadimicCertificate = fileName;

                img = acadimicCertificate[i];
                path = Path.Combine(Server.MapPath("~/Uploads/"), fileName);
                img.SaveAs(path);
                ++i;
                acadimi.JobSeekerId = userID;
                db.AcadimicDetails.Add(acadimi);
                try
                {
                    db.SaveChanges();
                }
                catch (Exception ee)
                {
                    string mes = ee.InnerException.Message;
                    Exception d=new Exception();
                    object f  = ee.InnerException.Data;
                    f = ee.InnerException.HelpLink;
                    f = ee.InnerException.HResult;
                    f = ee.InnerException.Source;
                    f = ee.HelpLink;
                    f = ee.HResult;
                    f = ee.Source;
                    f = ee.Data;
                    string tem = ee.StackTrace;
                }
            }
}

 and The Model of Table is as :

public class AcadimicDetail
{
    public int Id { get; set; }
    public string acadimicName { get; set; }
    public string acadimicType { get; set; }
    public string acadimicTitle { get; set; }
    public DateTime acadimicEndDate { get; set; }
    public string acadimicCountry { get; set; }
    public string acadimicCity { get; set; }
    public string acadimicCertificate { get; set; }
    public string JobSeekerId { get; set; }
}

and the JobSeekerMore ViewModel is as :

public class JobSeekerMore
{
    public List MoreAcadimicDetials { get { return _MoreAcadimicDetials; } }
    private List _MoreAcadimicDetials = new List();
}

Now when Enter the below values into AcadimicDetail table are as :

Id=0 JobSeekerId="66a41cbf-0545-4a31-bc95-634af3a6b16b"

acadimicCertificate = "66a41cbf-0545-4a31-bc95-634af3a6b16bacadimicCertificate"

acadimicCity = "New Yourk"

acadimicCountry="USA"

acadimicEndDate = {1/1/0001 12:00:00 AM}

acadimicName="Teacher"

acadimicTitle="English"

acadimicType = "female"

the Exception Details are as :

InnerException Message "An error occurred while updating the entries. See the inner exception for details."

HResult = -2146233087

InnerException.Source = "EntityFramework"

StackTrace

at System.Data.Entity.Internal.InternalContext.SaveChanges()

at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()

at System.Data.Entity.DbContext.SaveChanges()

at jobPortal.Controllers.JobSeekerInfoesController.Create(JobSeekerMore AllJobSeekerInfos, HttpPostedFileBase[] acadimicCertificate)