You customized tree view to see the product id ? I don't know the answer to that question. I think we need to test in a test database and make backups as you advance in the project management with odoo. But on reflection, I think that to fill id already allocated must first remove ... can you remove all items created?

Of course that I customized this view. I want to well understand how odoo works before to import all my products.

I can easily delete all the products that I want. But ID always increase.

From what I have seen, the system increments the id to each creation. If you create an article without finishing the procedure (ie without saving), an id will still be used for anything. But after all it does not matter as the system manages the internal id, just let him do good, right?

I know, I know... you are right. thanks.