<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib tagdir="/WEB-INF/tags" prefix="bo"%>
<f:view>
<bo:template>
<h:form>    
<table>
...
</table>
</h:form>
</bo:template>
</f:view>

...
<td style="border-bottom: solid 2px #4A4E56;">
   <f:subview id="topmenu"><jsp:include page="menu.jsp"/></f:subview>
</td>
...

<h:form id="tmenu">
...
<h:commandLink id="linkAddClient" action="ADD_USER" value="Add Client" />
...
<h:commandLink id="linkListClients" action="LIST_USERS" value="Clients' List" />
...
</h:form>

java.lang.IllegalStateException: Duplicate component ID 'tmenu:topmenu:linkAddClient' found in view.