Hi,

For this you can inherit and add active_test False in the context. See the below code,

<record id="sale_order_inherit" model="ir.ui.view">
    <field name="name">sale.order.inherit</field>
    <field name="model">sale.order</field>
    <field name="inherit_id" ref="sale.view_order_form"/>
    <field name="arch" type="xml">
        <field name="user_id" position="attributes">
            <attribute name="context">{'active_test': False}</attribute>
        </field>
    </field>
</record>

Thanks