Hi,

The error you’re facing is caused by Odoo’s multi-company access rules. In a multi-company setup, every warehouse location (stock, scrap, inventory adjustment, etc.) is linked to a specific company. The security rule “Location multi-company” prevents users from seeing or using locations that belong to companies they don’t have access to. When your branch user tries to update On Hand Quantity, Odoo internally creates stock moves between the warehouse and special virtual locations. If one of those virtual locations (such as “Inventory Adjustment” or “Scrap”) is tied to the main company, Odoo will block the operation because the branch user doesn’t have access rights to that company.

This explains why the system is referencing the main company’s warehouse (NBS COMPANY) even though the user is working in the branch. The process of adjusting inventory isn’t just about the branch warehouse; it also involves virtual locations, and if those are not set up per company, Odoo ends up pointing to the wrong one. That’s why the error disappears when you give the user access to both companies: they suddenly have permission to see the main company’s locations. But that also means they can see data you don’t want them to, which breaks the principle of separation between companies.

The correct solution is not to expand the user’s company access, but to fix the location ownership. Each company in Odoo should have its own complete set of stock locations: Stock, Input, Output, Inventory Adjustment, and Scrap. If your branch company’s warehouse is using adjustment or scrap locations that still belong to the main company, you need to duplicate those locations, assign them to the branch company, and update the warehouse and routes to use the branch-owned versions. That way, when branch users adjust stock, all moves stay within the scope of the branch company, and the security rules are respected.

Once you ensure that every warehouse and virtual location is properly assigned to the correct company, your branch users will be able to update On Hand Quantity freely in their own warehouse, without ever touching records from the main company. This keeps data isolated per company and removes the need to grant unnecessary access to NBS COMPANY.

Hope it helps