Gostaria de saber como posso resolver este erro no jsf.
13/09/2010 17:59:11 com.sun.facelets.FaceletViewHandler handleRenderException
GRAVE: Error Rendering View[/pages/site/index.xhtml]
java.lang.IllegalStateException: A ID de componente j_id31:productDataGrid:j_id44 já foi encontrada na visualização.
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:724)
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:708)
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:708)
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:708)
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:708)
at com.sun.faces.util.Util.checkIdUniqueness(Util.java:708)
at com.sun.faces.application.StateManagerImpl.saveView(StateManagerImpl.java:129)
at javax.faces.application.StateManager.saveSerializedView(StateManager.java:183)
at javax.faces.application.StateManagerWrapper.saveSerializedView(StateManagerWrapper.java:82)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:617)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:127)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:313)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)