I want to remove some fields from a custom sale report, but both the original and the custom report are printed.

< report id="report_so_ext" string="Print without prices" model="sale.order" report_type="qweb-pdf" name="aro_ext.custom_so_report" file="aro_ext.custom_so_report" menu="True"/>

< template id="custom_so_report_ext" inherit_id="sale.report_saleorder_document" primary="True">

< xpath expr="//th[@name='th_priceunit']" position="replace">< /xpath>

< xpath expr="//th[@name='th_subtotal']" position="replace">< /xpath>

< xpath expr="//td[@name='td_priceunit']" position="replace">< /xpath>

< xpath expr="//td[@name='td_subtotal']" position="replace">< /xpath>

< /template>


< template id="custom_so_report" inherit_id="sale.report_saleorder"> 

< t t-call="web.html_container"> 

< t t-foreach="docs" t-as="doc"> 

< t t-call="aro_ext.custom_so_report_ext" t-lang="doc.partner_id.lang"/> 

< /t> 

< /t>

< /template>

Thank you for any suggestions