Porque me genera este error al generar una solicitud de permiso en el portal?

El error Es: La acción 'Create' del controlador 'SolicitudPermiso' ha lanzado la excepción 'UpdateException' con el mensaje: Entities in 'AppDataContext.ActividadesAutorizacionInstancias' participate in the 'FK_wfl_ira_1_wfl_ain' relationship. 0 related 'ira_instancias_rutas_aut' were found. 1 'ira_instancias_rutas_aut' is expected.

Detalle: System.Data.UpdateException: Entities in 'AppDataContext.ActividadesAutorizacionInstancias' participate in the 'FK_wfl_ira_1_wfl_ain' relationship. 0 related 'ira_instancias_rutas_aut' were found. 1 'ira_instancias_rutas_aut' is expected. at System.Data.Mapping.Update.Internal.UpdateTranslator.RelationshipConstraintValidator.ValidateConstraints() at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager, IEntityAdapter adapter) at System.Data.Objects.ObjectContext.SaveChanges(SaveOptions options) at Aseinfo.VH4.Data.AppDataContext.SaveChanges(SaveOptions options) in c:BuildAgentwork608d469cc106b504VH4DataModelAppDataContext.cs:line 81 at Aseinfo.Infrastructure.Base.Entity.GenericEntityRepository.SaveChanges() in c:vh4InfrastructureBaseEntityGenericEntityRepository.cs:line 218 at Aseinfo.Infrastructure.Base.Entity.EntityServiceBase2.SaveChanges() in c:\vh4\Infrastructure\Base\Entity\EntityServiceBase.cs:line 529 at Aseinfo.Infrastructure.Base.Entity.EntityServiceBase2.DoInsert(T entity, Boolean saveChanges, Boolean bypassWorkflowInitialization) in c:vh4InfrastructureBaseEntityEntityServiceBase.cs:line 827 at Aseinfo.VH4.Solicitudes.Controllers.SolicitudPermisoController.SaveSolicitudPermiso(SolicitudPermiso entity, Boolean inserting, Nullable1 codigoTipoTiempoNoTrabajado, Nullable1 codigoEmpleo) in c:BuildAgentwork608d469cc106b504VH4SolicitudesControllersSolicitudPermisoController.cs:line 399 at Aseinfo.VH4.Solicitudes.Controllers.SolicitudPermisoController.Create(SolicitudPermiso entity, DateTime fechaInicio, DateTime fechaFin, Nullable1 codigoTipoTiempoNoTrabajado, Nullable1 codigoEmpleo) in c:BuildAgentwork608d469cc106b504VH4SolicitudesControllersSolicitudPermisoController.cs:line 266 at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>cDisplayClass15.<invokeactionmethodwithfilters>b12() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)