Error al guardar Tiempos No Trabajados

al guardar una accion de tiempos no trabajados me devuelve el siguiente error:

La acción 'Create' del controlador 'TiempoNoTrabajado' ha lanzado la excepción 'NotSupportedException' con el mensaje: The specified type member 'Estado' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported.

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System.NotSupportedException: The specified type member 'Estado' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported. at System.Data.Objects.ELinq.ExpressionConverter.MemberAccessTranslator.TypedTranslate(ExpressionConverter parent, MemberExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.UnaryTranslator.TypedTranslate(ExpressionConverter parent, UnaryExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq) at System.Data.Objects.ELinq.ExpressionConverter.EqualsTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.BinaryTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.BinaryTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.BinaryTranslator.TypedTranslate(ExpressionConverter parent, BinaryExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq) at System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call) at System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq) at System.Data.Objects.ELinq.ExpressionConverter.Convert() at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable1 forMergeOption) at System.Data.Objects.ObjectQuery1.GetResults(Nullable1 forMergeOption) at System.Data.Objects.ObjectQuery1.System.Collections.Generic.IEnumerable<t>.GetEnumerator() at System.Linq.Enumerable.Single[TSource](IEnumerable1 source) at System.Linq.Queryable.Any[TSource](IQueryable1 source, Expression1 predicate) at Aseinfo.VH4.Acciones.Services.SolicitudVacacionRuleValidator.RangoFechasEsValido(Int32 codigoEmpleo, DateTime fechaInicial, DateTime fechaFinal, Boolean comparaHora, EntityObject entityObject) in c:\BuildAgent\work\608d469cc106b504\VH4\Acciones\Services\SolicitudesVacaciones\SolicitudVacacionRuleValidator.cs:line 370 at Aseinfo.VH4.General.Services.Validaciones.ValidadorFechasDisponibles.RangoFechasEsValido(Int32 codigoEmpleo, DateTime fechaInicial, DateTime fechaFinal, Boolean comparaHora, EntityObject entityObject) in c:\BuildAgent\work\608d469cc106b504\VH4\General\Services\Validaciones\ValidadorFechasDisponibles.cs:line 46 at Aseinfo.VH4.Salarios.Services.TiempoNoTrabajadoRuleValidator.Validate(TiempoNoTrabajado entity) in c:\BuildAgent\work\608d469cc106b504\VH4\Salarios\Services\TiemposNoTrabajados\TiempoNoTrabajadoRuleValidator.cs:line 91 at Aseinfo.Infrastructure.Base.Entity.EntityServiceBase2.DoInsert(T entity, Boolean saveChanges, Boolean bypassWorkflowInitialization) in c:BuildAgentwork608d469cc106b504InfrastructureBaseEntityEntityServiceBase.cs:line 773 at Aseinfo.VH4.Salarios.Controllers.TiempoNoTrabajadoController.SaveTiempoNoTrabajado(TiempoNoTrabajado entity, Nullable1 codigoEmpleo, Nullable1 codigoEmpleoSolicita, String codigoTipo, String codigoVisualTipoPlanilla, String codigoVisualPlanilla, Nullable1 horaInicio, Nullable1 horaFinal, Boolean inserting, Nullable1 iniciaFlujo) in c:\BuildAgent\work\608d469cc106b504\VH4\Salarios\Controllers\TiempoNoTrabajadoController.cs:line 453 at Aseinfo.VH4.Salarios.Controllers.TiempoNoTrabajadoController.Create(TiempoNoTrabajado entity, Nullable1 codigoEmpleo, Nullable1 codigoEmpleoSolicita, String codigoTipo, String codigoVisualTipoPlanilla, String codigoVisualPlanilla, Nullable1 horaInicio, Nullable1 horaFinal, Nullable1 iniciaFlujo) in c:BuildAgentwork608d469cc106b504VH4SalariosControllersTiempoNoTrabajadoController.cs:line 264 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)