Entity framework и mysql

am trying to return the pets that are linked to a certain client but the message Sql = The function evaluation requires that all threads are executed. But I'm not able to find out why this happens, if someone can help me

  public ActionResult Index()
    {

        if (Session["nomeUsuarioLogado"] != null && Session["usuarioLogadoID"] != null)

        {
            int idcliente = new LoginController().Clientes(this);

            var consultar = from Pets in db.pets
                            join c in db.clientes on Pets.id_pets equals c.id_cliente
                            where c.id_cliente == idcliente
                            select Pets;

            return View(consultar);


            //    return View(db.pets.ToList());
        }
        return RedirectToAction("Index", "login");
    }




}

am trying to return the pets that are linked to a certain client but the message Sql = The function evaluation requires that all threads are executed. But I'm not able to find out why this happens, if someone can help me