Hi,

In Odoo Manufacturing, the reason you cannot have more than one worker clocked in at the same time on the same Manufacturing Order is that you are using a shared user license, and Odoo only allows one active session per user. The proper way to handle this is not by creating 10 separate Odoo users, but by setting up each of your workers as employees (under Employees → Employees) and giving them their own PIN codes. Employees do not consume Odoo user licenses; they are just records used for attendance and time tracking. Once this is configured, you can enable the Shop Floor / Kiosk view in Manufacturing, where each worker logs in with their own employee PIN. This allows multiple employees to clock in and record time on the same Manufacturing Order simultaneously, with Odoo tracking overlapping work correctly under each employee. In short, instead of trying to share one “user” login among many people, you should configure your workers as employees with PIN codes, so they can all be active on an MO at the same time without extra licenses.

For additional informations.

* https://www.cybrosys.com/blog/how-the-multi-employee-per-session-feature-works-in-odoo-16-pos-app

* https://www.youtube.com/watch?v=uFNc87ZA3pc

Hope it helps