> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# Preamble - Cdiscount Flux

## Compatibility

Cdiscount Flux is compatible with **PrestaShop 1.6 and newer versions**.

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## Requirements

No advanced technical knowledge is required to use this module. However, a basic understanding of how online marketplaces operate will help you configure and manage your catalog more efficiently.
Before getting started, it is essential to understand the difference between a **product** and an **offer**, as these concepts are fundamental to all marketplaces.

For more information, please read: [**Clearly Differentiate Between a Product and an Offer**](https://doc.common-services.com/en/article/clearly-differentiate-between-an-offer-and-a-product-cdiscount-flux-prestashop-15wd1x8/)

Understanding this distinction will help you correctly configure your products, create offers, and avoid common catalog synchronization issues.

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## EAN Codes

Cdiscount Flux works by either matching your products with existing items in the Cdiscount catalog or creating new product listings when necessary.

To do this, the module sends the **EAN code** associated with each product. If a matching product already exists on Cdiscount, the marketplace automatically links your offer to the existing product page.

|| **Important:** You must use official barcode numbers issued by GS1 or another authorized organization. Fake, internal, or locally generated codes (for example, `0000000001231`) are not accepted and may cause your products to be rejected by the marketplace.

If your products do not have EAN codes, we recommend reading our article: [**Barcodes, EAN, UPC, and GTIN for eCommerce and Marketplaces**](https://common-services.com/barcodes-ean-upc-gtin-for-ecommerce-solutions-and-marketplaces/)

This guide explains the different product identifiers and their importance when selling on marketplaces.