If you already have the same website products published on eBay after installation of the module,
it is necessary to create a link inside the module, so that the module can correctly manage them by revising them.
If you do not do this, the module will publish your products as new eBay listings,
creating potential duplicates in violation of eBay rules.
Fastbay allows you to create this association by uploading a CSV file composed of two columns in the “Products” tab (as described here).
eBay allows you to download the list of active products in your account in CSV format at any time via the free tool “File Exchange“,
You can therefore use this file as the basis for generating the CSV to be imported into the module.
In this video you will find an overview of how to proceed to create the link.