I just start a new fresh odoo 12 community server, and i am doing some test, I have one product created without quantities, and multiple warehouses. When I create the stock picking and i try to update the qty manually (because the force aviability button is not anymore there) I can not edit the qty Done.

I check the views and the code and i get this is_quantity_done_editable field, depend of this other field show_details_visible and as result i can not edit my qty Done to force that product, and validate the stock picking. I know that i can edit any of those code(views or code) and get what i want but how is the regular good process to edit those qty if i dont have any of the product on the line?