Hi,

As you are using odoo 10, you have to use an OCA module:  Read Only ByPass

This module changes the behaviour of Odoo by propagating on_change modifications to readonly fields to the backend create and write methods.

To change that behavior you have to set context on ir.actions.act_window:


{'readonly_by_pass': True}

or by telling fields allowed to change:



{'readonly_by_pass': ['readonly_field_1', 'readonly_field_2',]}


On one2many fields, you can also pass the context in the field definition:

From the version 11 and above, we can use force_save="1" along with the field.