Error saving data with EF

I'm setting up my unit tests and tried saving the data to a table using the Entity Framework, but at the time I run it returns an error.

  

Validation failed for one or more entities. See   'EntityValidationErrors' property for more details.

  

inSystem.Data.Entity.Internal.InternalContext.SaveChanges()in  System.Data.Entity.Internal.LazyInternalContext.SaveChanges()on  System.Data.Entity.DbContext.SaveChanges()in  ShoppingCart.Infra.Data.EF.Repositorios.RepositorioBase'1.Add(TEntity  obj)inC:\WORK\1-Files  Personal\ShoppingCart\ShoppingCart.Infra.Data.EF\Repositories\RepositorioBase.cs:line  17inCart.Application.Test.OrdersTest.InclarPedidos()  inC:\WORK\1-Files  Personal\ShoppingCart\ShoppingCart.Application.Test\OrdersTest.cs:line  53

I'veseenthatEFseemstobetryingtoinsertintoadependencytablefromwhichI'mtryingtoinsertthedata.

usingCarrinhoDeCompras.Domain.Entidades;usingCarrinhoDeCompras.Domain.Interfaces.Repositorios;usingCarrinhoDeCompras.Infra.Data.EF.Repositorios;usingMicrosoft.VisualStudio.TestTools.UnitTesting;usingSystem;namespaceCarrinhoDeCompras.Application.Test{[TestClass]publicclassOrdersTest{privateIRepositorioOrders_repositorio;[TestMethod]publicvoidInclirPedidos(){varorder=newOrders(){CustomerID=85,Customer="VINET",
                EmployeeID = 5,
                OrderDate = DateTime.Now,
                RequiredDate = DateTime.Now,
                ShippedDate = DateTime.Now,
                ShipVia = 3,
                Freight = 13,
                ShipName = "Vins et alcools Chevalier",
                ShipAddress = "59 rue de l'Abbaye",
                ShipCity = "Reims",
                ShipPostalCode = "51100",
                ShipCountry = "France",
            };


            try
            {
                _repositorio = new RepositorioOrders();
                _repositorio.Add(order);
            }
            catch (Exception ex)
            {
                throw;
            }
        }
    }
}

As you can see I'm passing the dependency table IDs as CustomerID = 85, , but it's still complaining about that field.

My Orders classes.

public partial class Orders
    {
        public Orders()
        {
            this.OrderDetails = new HashSet<OrderDetails>();
            this.Employees = new Employees();
            this.Customers = new Customers();
            this.Shippers = new Shippers();
        }

        public int OrderID { get; set; }
        public int? CustomerID { get; set; }
        public string Customer { get; set; }
        public int? EmployeeID { get; set; }
        public DateTime? OrderDate { get; set; }
        public DateTime? RequiredDate { get; set; }
        public DateTime? ShippedDate { get; set; }
        public int ShipVia { get; set; }
        public decimal? Freight { get; set; }
        public string ShipName { get; set; }
        public string ShipAddress { get; set; }
        public string ShipCity { get; set; }
        public string ShipRegion { get; set; }
        public string ShipPostalCode { get; set; }
        public string ShipCountry { get; set; }
        public virtual Customers Customers { get; set; }
        public virtual Employees Employees { get; set; }
        public virtual ICollection<OrderDetails> OrderDetails { get; set; }
        public virtual Shippers Shippers { get; set; }
    }