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# Error 99001 - A value is required for the "recommended_browse_nodes" field.

(In the CS Amazon Sync app)

It is a good practice to have recommended browse node (could be named category) to classify his products on Amazon.

For some products, it is even a requirement and Amazon will show an error in the Feeds:

![](https://storage.crisp.chat/users/helpdesk/website/3fa8ee645cd13200/image_1rqpyl2.png)

To fix it, you just have to create rules that associate to your products the best matching category on Amazon:

![](https://storage.crisp.chat/users/helpdesk/website/3fa8ee645cd13200/image_1uouwhg.png)

Category search sample:

![](https://storage.crisp.chat/users/helpdesk/website/3fa8ee645cd13200/image_1jp8pcz.png)