Seam testing+Duplicate factory for: org.jboss.seam.web.webSession (duplicate is specified in components.xml)

[lupuslupuslupus]

I try to test Seamdiscs provided by jboss-seam-2.1.2.CR2/examples/seamdiscs/, when I run TestNG testing, I get the errors like "Duplicate factory for: org.jboss.seam.web.webSession (duplicate is specified in components.xml)". I have searched around Internet, no solutions for it. Please help.  Details are as follows:

ERROR [org.hibernate.tool.hbm2ddl.SchemaExport] schema export unsuccessful
org.hibernate.JDBCException: Error during import script execution

...

FAILED CONFIGURATION: @BeforeSuite startSeam
java.lang.IllegalStateException: duplicate factory for: org.jboss.seam.web.webSession (duplicate is specified in components.xml)
        at org.jboss.seam.core.Init.checkDuplicateFactoryExpressions(Init.java:227)
        at org.jboss.seam.core.Init.checkDuplicateFactory(Init.java:220)
        at org.jboss.seam.core.Init.addFactoryValueExpression(Init.java:283)
        at org.jboss.seam.init.Initialization.installComponents(Initialization.java:1152)
        at org.jboss.seam.init.Initialization.init(Initialization.java:733)
        at org.jboss.seam.mock.AbstractSeamTest.startSeam(AbstractSeamTest.java:919)
        at org.jboss.seam.mock.DBUnitSeamTest.startSeam(DBUnitSeamTest.java:56)
... Removed 15 stack frames


My components.xml is as follows:

<components ...
        <core:init debug="false" jndi-pattern="@jndiPattern@" />

        <core:manager concurrent-request-timeout="500"
                conversation-timeout="120000"
                conversation-id-parameter="cid"/>

        <persistence:managed-persistence-context name="entityManager"
                auto-create="true"
                persistence-unit-jndi-name="java:/seamdiscsEntityManagerFactory" />

        <security:identity
                authenticate-method="#{authenticator.authenticate}" />

    <event type="org.jboss.seam.security.notLoggedIn">
        <action execute="#{redirect.captureCurrentView}"/>
    </event>
   
    <event type="org.jboss.seam.security.loginSuccessful">
        <action execute="#{redirect.returnToCapturedView}"/>
    </event>
 
        <framework:entity-query name="discs" ejbql="select disc from Disc disc" order="disc.name ASC" max-results="5"/>
       
        <framework:entity-query name="artists" ejbql="select artist from Artist artist" order="artist.name DESC" max-results="5">
      <framework:restrictions>
        <value>lower(artist.name) like lower(concat(#{exampleArtist.name}, '%'))</value>
      </framework:restrictions>
    </framework:entity-query>
       
        <framework:entity-query name="allArtists" ejbql="select artist from Artist artist" order="artist.name"/>
       
        <framework:entity-home entity-class="org.jboss.seam.example.seamdiscs.model.Disc" name="discHome"/>
       
        <factory name="disc" value="#{discHome.instance}"/>
 
        <component name="exampleArtist" class="org.jboss.seam.example.seamdiscs.model.Artist" scope="session" />

        <transaction:ejb-transaction/>
</components>

[almeyer]

I get this same exception after creating a project in eclipse (Dynamic Web Project with Seam 2.1 technology preview) using JBoss Tools (I assume) which you would think should work being a basic starter project.  The error is absolutely useless.