ERROR : duplicate Id for a component pageHeader

[techluver]

I'm using rich:datascroller & rich:dataTable and getting following error :
java.lang.IllegalStateException: duplicate Id for a component pageHeader
at org.ajax4jsf.application.AjaxStateManager$TreeStrutureNode.apply(AjaxStateManager.java:326)
at org.ajax4jsf.application.AjaxStateManager$TreeStrutureNode.apply(AjaxStateManager.java:348)
at org.ajax4jsf.application.AjaxStateManager.saveSerializedView(AjaxStat

[ilya_shaikovsky]

provide details like page, environment and additional steps you perform on your page.