product combination PrestaShop 8.2

[Pedro Rocha]

Hello everybody,
In my store I have 3 products with different sizes. (M, L and XL).
Each product is fully filled with references, quantities, etc.
I changed it to combination. In other words, having only 1 article that fetches the 3 products.
Do I have to fill everything in again, add references, images, etc.?
And how do I ensure that only 1 item appears in the store with the 3 options, as there are still 3 items visible.

Thanks

[Prestashop Addict]

On one with 3 options, just add EAN/SKU/STOCK and add images if different from combinations, and remove old products