OpenERP - XML - How to hide the report tag?

Good morning,

I have to show/hide a report tag in a report.xml file depending on the state of the object, but the following code does not work, when i update de OpenERP module, it shows me an error message:

"openerp Invalid attribute attrs for element report"

Here ir the code:

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>

    <report
        auto="False"
        id="partidas_contralor"
        model="grp.account.partidas.contralor.header"
        name="grp.account.partidas.contralor.header"
        rml="grp_partidas_contralor/report/partidas_contralor.rml"
        string="Imprimir partida contralor"
        header="True"
    />

    <report
        auto="False"
        id="declaracion_jurada"
        model="grp.account.partidas.contralor.header"
        name="grp.declaracion_jurada_partidas_print"
        rml="grp_partidas_contralor/report/declaracion_jurada.rml"
        string="Imprimir declaración jurada"
        header="True"
        attrs="{'invisible':[('state','!=','draft')]}"
    />

</data>
</openerp>

Thanks in advance.