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# Skipping product: X/X has no Reference - Amazon Marketplace Plus

## Error: Product without reference

Export log message:

||| Skipping product: X/X has no Reference

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## Cause

Your product does not meet the required catalog structure for export.  
The **Reference** field (SKU on Amazon) is missing.  
This field is **essential** for exporting your products.

See: [Validate your catalog structure](https://doc.common-services.com/en/article/validating-your-catalog-structure-amazon-marketplace-plus-d3xsyp/) and apply these guidelines to **all your products and combinations**.

---

## Solution

1. Open the product sheet in PrestaShop.
2. Fill in the **Reference** field in the **Information** tab.
3. If the product has combinations, add a unique reference for each one.

**Example of missing Reference field for a product:**  

![PrestaShop Amazon Marketplace Example of Reference field missing for a product](https://storage.crisp.chat/users/helpdesk/website/-/3/f/a/8/3fa8ee645cd13200/prestashop-amazon-marketplace-_2qb9g6.png)

**Example of missing Reference field for a combination:**  

![PrestaShop Amazon Marketplace example of reference field missing](https://storage.crisp.chat/users/helpdesk/website/-/3/f/a/8/3fa8ee645cd13200/prestashop-amazon-marketplace-_1tnhjd0.png)