What is the problem with this code? I couldn't understand the problem.

Here I'm inheriting view from other module.

<?xml version="1.0" encoding="UTF-8"?>
<odoo>
  <record id="view_form_todo_task_inherit_tree" model="ir.ui.view">
      <field name="name">Todo Task Form - User Extension</field> 
      <field name="model">todo.task</field>
      <field name="inherit_id" ref="todo_app.view_form_todo_task" />
      <field name="arch" type="xml">
          <!-- <field name="state" position="after">
              <field name="de" />
          </field> -->
      </field>
  </record>
</odoo>