I want to generate a reordering rule for a product. The desired behaviour is that I create a SO, and the SO generates an action/task in  Inventory > Operations > Replentishment (or reordering). There I select a subcontractor form a list and this generates the PO for that vendor.

This ordering rule is manual so I can select a subcontractor from a list of 4, and then generate a purchase order. There is a video about a similar issue called "Multiple Subcontractors & Dropship + Lead Times - v15". The issue I have is that Odoo generates the purchase order automatically, so I can't select the subcontractor. When configuring the product, the BOM has Subcontractor selected and it's required to have at least one subcontractor, I have all 4. I also have to enter at all 4 subcontractors on the Purchase tab of the product and assign a price (can be cero). This is where the issue is generated since the PO is generated automically and it takes the first subcontractor from the Purchase tab list. And I want to generate a reordering action and select manually, but this is not happening.

If I delete all 4 from the Purchase tab list, then I get an error message at the time of generating the SO saying there is no vendor, price, etc. to generate the PO.

And I aslo can't delete the subcontractors from the BOM because they are required when selecting the type of BOM.

Anyone knows how to fix this