i have my code in this way is there any problem in this code and how to solve it

<odoo>

  <data>

    <record model="ir.ui.view" id="custom_sale_order_view">

      <field name="name">custom.sale.order.view</field>

      <field name="model">sale.order</field>

      <field name="inherit_id" ref="sale.view_order_form"/>

      <field name="arch" type="xml">

              <xpath expr ="//field[@name='payment_term_id']" position="after">

          <field name="new_field"/>

        </xpath>

      </field>

   </record>

  </data>

</odoo>

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I have set all the models imported all required fields and set the models.py as it requires but eventhough error occure,