You will get this error message in return from eBay when, in a listing with variations (with a drop down menu on Ebay), a specification was configured (in the Fastbay’s Condition and Specifics tab) with a value that is already used as a variation.

Typical example is when you use “Size” or “Color” as an attribute in Prestashop,
and you also have mapped “Size” / “Color” as specification in “Specific / Condition” tab of the module

This is not permitted by Ebay rules – You can work around this in two ways :

• IF the specification “Size” / “Color” is NOT mandatory by eBay or it is mandatory, but it is already used as VARIATION in your ad, simply unmap it from the “Specific / Condition” tab
• IF the specification “Size” / “Color” is mandatory by eBay (highlighted in red in the module) you must rename your Prestashop attribute group name (there’s no need to rename the “Public name” – you’ll e-commerce frontend will not be affected) with something else (ie “Exact color”) , so eBay will receive a different value from the specification.