According the details (Settings > Technical > DataBase Structure > Models) of model 'pos.config', it has a field which name is 'shop_id' and 'many2one' to model 'sale.shop'.

However, I can't edit 'shop_id' on the edit page for 'pos.config'.

Anyway, I extend the form view of 'pos.config' add this field to the page with the code:

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

      <field name="name">View Form SmallPos</field>

      <field name="model">pos.config</field>

      <field name="inherit_id" ref="point_of_sale.view_pos_config_form"/>

      <field name="arch" type="xml">

        <field name="name" position="after">

          <field name="shop_id"/>

        </field>

      </field>

    </record>

When I create new shop on the dialog page, it always complain:

The following fields are invalid: Pricelist

So, are there anyone can give me some advice to solve this issue?

Thanks.