Sqlexceptionbinary or data be truncated?

public ActionResult SubmitRegDetails(RegViewAndRoleViewModel eNtsaRegistration)
{


    if(ModelState.IsValid)
    {
        eNtsaRegistration.RegForm.Id = Guid.NewGuid();
        db.eNtsaRegForms.Add(eNtsaRegistration.RegForm);
        db.SaveChanges();
        return RedirectToAction("SaveRegForm");
    }

public class eNtsaRegForm
    {
        [Key]
        public Guid? Id { get; set; }
        public string Title { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Position { get; set; }
        public string Company { get; set; }
        public string StreetAddress { get; set; }
        public string StreetAddressLine { get; set; }
        public string City { get; set; }
        public string StateProvince { get; set; }
        public int ZipCode { get; set; }
        public string Country { get; set; }

        [Required(ErrorMessage = " This field is required")]
        [EmailAddress(ErrorMessage = "Invalid email address")]
        public string Email { get; set; }
        
        public int CellNumber { get; set; }
        public string DietaryRequirements { get; set; }


    }