I am creating a series of custom reports for our business and would like to use a common basic header and footer which most of the reports would use, but with the ability to change them slightly for different specific reports.

I have created a basic header and footer which work just fine, but when inheriting them to modify them for the specific reports the basic gets overridden and the changes appear on all reports.

Based on the answer to another question on this forum (https://www.odoo.com/forum/help-1/question/inheriting-a-view-without-overriding-the-original-view-solved-85762), I tried adding mode="primary" to the template tag:

<template id="special_footer_layout" inherit_id="base_reports.base_report_footer" priority="17" mode="primary">

But end up with receiving the following error upon upgrading my module:

    File "lxml.etree.pyx", line 3373, in lxml.etree._Validator.assert_ (src/lxml/lxml.etree.c:166352)
AssertionError: Element openerp has extra content: data, line 4

I am fairly new at this, and most of my experience is with OpenERP V6.1 Is it possible to do what I am asking?