Hi,

In odoo, you cannot change the unit of measure (UoM) for a product in Odoo if there are existing stock moves associated with that product. This restriction ensures data consistency and prevents potential issues with existing transactions.

Here's how you can handle this situation in Odoo:

1)Archive and Create a New Product

Archive the Existing Product:

2)Create a New Product with the Desired UoM:

After archiving the existing product, go back to the product list.

Click on the Create button to add a new product.

Fill in the details for the new product, including the desired unit of measure.

Save the new product.

Or

you can remove Stock Moves (Advanced)

Note: This option is more complex and should be approached with caution. Ensure you have proper backups before proceeding.

Hope it helps