Hi,

The duplicate products you see in the Point of Sale → Products menu are not real duplicates but are caused by POS displaying both product templates and their corresponding product variants. This became visible after you added internal references, which made Odoo show both records. In Inventory → Products, everything looks normal because only templates are shown there.

To fix this, you need to adjust the POS menu configuration. Check the menu action under Settings → Technical → User Interface → Menu Items and see if it points to product.product (variants) or product.template (templates). If you only want one type to appear, you can change the menu to use the right model or add a domain filter. In most cases, POS is designed to work with product variants, so if you don’t need multiple variants per product, keeping only a single variant will also prevent duplicates from showing.

Hope it helps

es por que cargaste los productos sin ID, y los duplicaste, solucion rapida elimina todo y carga los productos con id y los datos que necesites si con esa plantilla puedes modificar sin duplicar 

Pudiste resolverlo?