Error: Duplicate reference for these products

When exporting products, you may see:

Duplicate reference entry for product, Product ID: [2/7, 2/8, 2/9, 2/10, …]

(Export summary may also show Duplicate reference.)

The list uses product / combination IDs in the form 1/2.

Each listed entry shares a reference already used elsewhere in the catalog (at least twice) — which is invalid for Cdiscount / Octopia.

Duplicate example:

Every product and every combination must have a unique reference:

Validate your catalog structure

Find a product by its ID in the catalog:

Updated on: 12/10/2026