[FIX] base: deactivate lang
[FIX] base: deactivate lang

- Install a new language
- Set it as default for several users
- Open the language and click on "Deactivate"

Traceback.

Fixes #21418
opw-786342

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo