meu xtml
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:c="http://java.sun.com/jsf/core">
<h:head>
<title> - SVP Sistema Venda de Passagens 0.1</title>
<link rel="stylesheet" href="../../css/bootstrap.css"></link>
</h:head>
<h:body>
<div id="bannerPag">
<f:insert name="bannerPag">
<f:include src="../banner/banner.xhtml" />
</f:insert>
</div>
<div class="container" style="padding-top: 80px;">
<div class="row" id="menuApp">
<f:insert>
<f:include src="../menus/menuUserAdm.xhtml"/>
</f:insert>
</div>
<div id="cad">
<h:form styleClass="form-horizontal well" style="margin-left: -20px;" id="form">
<fieldset>
<legend>Consulta Lotação Rota</legend>
<p:growl id="growl" showDetail="true" autoUpdate="true" life="10000" />
<div class="control-group" style="padding-top: 40px;">
<h:outputLabel value="Escolha a Rota" styleClass="control-label" />
<div class="controls">
<p:selectOneMenu value="#{consultaLotacaoController.idRotaAux}" style="width: 300px;" >
<c:selectItem itemLabel="Selecione a Rota..." itemValue="#{null}"/>
<c:selectItems value="#{consultaLotacaoController.listaRota}" var="r" itemLabel="#{r.dsRota}" itemValue="#{r.idRota}" />
<p:ajax event="change" process="@this" listener="#{consultaLotacaoController.searchRota}" update="panelDia"/>
</p:selectOneMenu>
</div>
</div>
<div class="control-group">
<h:outputLabel value="Escolha o Dia" styleClass="control-label" />
<div class="controls">
<p:outputPanel id="panelDia" >
<p:selectOneMenu value="#{consultaLotacaoController.idDiaAux}" style="width: 300px;"
disabled="#{consultaLotacaoController.idRotaAux == null}" >
<c:selectItem itemLabel="Selecione o Dia..." itemValue="#{null}" rendered="#{consultaLotacaoController.idRotaAux != null}"/>
<c:selectItems value="#{consultaLotacaoController.listaDiaDtoAux}" var="diaAux" itemValue="#{diaAux.idDia}"
itemLabel="#{diaAux.label}" />
<p:ajax event="change" process="@this" listener="#{consultaLotacaoController.searchDia}" update="panelHorario"/>
</p:selectOneMenu>
</p:outputPanel>
</div>
</div>
<div class="control-group">
<h:outputLabel value="Escolha o Horário" styleClass="control-label" />
<div class="controls">
<p:outputPanel id="panelHorario" >
<p:selectOneMenu value="#{consultaLotacaoController.horario.horario}" style="width: 300px;"
disabled="#{consultaLotacaoController.idDiaAux == null}">
<c:selectItem itemLabel="Selecione o Horário..." itemValue="#{null}" rendered="#{consultaLotacaoController.idDiaAux != null}"/>
<c:selectItems value="#{consultaLotacaoController.dia.listaHorarios}" var="h" itemLabel="#{h.horaFormatado}"
itemValue="#{h.horario}"/>
</p:selectOneMenu>
</p:outputPanel>
</div>
</div>
<p:outputPanel id="panelVagas" rendered="#{consultaLotacaoController.numeroVagas != null}" autoUpdate="true">
<div class="control-group">
<h:outputLabel value="Número de vagas :" styleClass="control-label" />
<div class="controls">
<h:outputLabel value="#{consultaLotacaoController.numeroVagas}" styleClass="control-label" />
</div>
</div>
</p:outputPanel>
<div class="form-actions">
<p:commandButton value="Verficar Lotação" styleClass="btn btn-primary" actionListener="#{consultaLotacaoController.buscarVagas}"
update="panelVagas"/>
<p:commandButton value="Limpar" styleClass="btn" style="margin-left: 10px;" actionListener="#{consultaLotacaoController.limpar}"
immediate="true" update=":form"/>
</div>
</fieldset>
</h:form>
</div>
<div id="foot">
<f:insert name="foot">
<f:include src="../footer.xhtml"/>
</f:insert>
</div>
</div>
</h:body>
</html>
Quando clico no botãao “Verificar Lotação” aparece esse erro
Erro de conversão ao definir o valor '08:30:00' para 'null Converter'.
Erro de conversão ao definir o valor '08:30:00' para 'null Converter'.
O que faço para resolver ?