• Italiano
  • English
  • Module guides
    • Amazon
    • FastBay
    • eBay Promoted Listings
    • eBay import
    • Idealo
    • Universal Import
    • Cross Selling
  • FAQ
    • General topics
    • FAQ FastBay
    • FAQ AmazonSync
  • Contact us
  • Module guides
    • Amazon
    • FastBay
    • eBay Promoted Listings
    • eBay import
    • Idealo
    • Universal Import
    • Cross Selling
  • FAQ
    • General topics
    • FAQ FastBay
    • FAQ AmazonSync
  • Contact us
home/FAQ/FAQ AmazonSync/FAQ AmazonSync – Domande frequenti/Sync Offers – Value for ‘externally_assigned_product_identifier’ is shorter than the allowed minimum (13 characters)
Ricerche popolaridebug mode, mandatory specifications, publish first product

Sync Offers – Value for ‘externally_assigned_product_identifier’ is shorter than the allowed minimum (13 characters)

Starting from the end of March 2025, Amazon deprecated the old listings sync mode, which will be completely removed starting from the end of June 2025. The new mode, fully supported since Amazon 2.5.0 release, adds stricter controls on EAN codes. They must be exactly 13 characters long. Otherwise you will receive the following error message and Amazon will not elaborate your listing:

Value for ‘externally_assigned_product_identifier’ is shorter than the allowed minimum (13 characters)

Should you notice that one of your listings is no longer getting updated, check what we explained at this link: in this way you will be certain that the offer was added to the file for Amazon and if its facing this issue or not. If it’s not possible to download the elaboration report because the next sync is performed before that the report was generated by Amazon, you can still verify it as explained here.

HOW TO SOLVE THE PROBLEM

In order to solve the problem you must associate to the Prestashop’s product (or its combination) the respective Amazon’s ASIN code. This operation can be performed in an automated or manual way.

Automatically

Go to the Bulk operations tab and perform an Inventory request operation, followed by an Inventory download.

AmazonSync request download inventory

AmazonSync will download the inventory file from Amazon and will look for the different SKUs on your website, using the the SKU source configured within the General tab as the search element.

AmazonSync sku source

In this example, Amazon’s SKU will be looked up within the Reference field in Prestashop (both for products and its combinations). That field must be unique on the whole website: on the contrary the module will not be able to recognize which website element is the correct one for the Amazon’s listing. In the following image you can see how the SKU recognition procedure works: Amazon reads the data from Seller Central, writes it to the inventory file, which will then be read by the module which will look for the data on the website.

AmazonSync riconoscimento SKU

The final result that confirms the operation succeeded is this: the ASIN code will be shown inside of the AmazonSync panel within the product sheet Modules tab.

AmazonSync salvataggio ASIN

Manually

The same operation can be performed manually, should the automated download fail. Follow what’s explained at this link to reach the same result as shown above, in the last image.
This mode is mandatory if your listings is not present yet in your inventory in Amazon and you want to upload it, but the EAN code is not 13 characters long.

USING ASIN DURING SYNC

The final step in this procedure consists in using ASIN code instead of EAN during the Sync Offers operation. This result can be achieved by enabling the Prioritize ASIN code within the module’s Sync tab. Enable it, then save the configuration and perform a new Sync.

AmazonSync prioritize ASIN

Tags:amazonAmazonSyncean

Was it helpful ?

Yes  No
Related articlesRelated articles
  • How to check listings sync elaboration status on Amazon
  • Listings or trackings are not updated on Amazon
  • Can I import an order if the product’s SKU differs from the one on Amazon?
  • Offers are not being exported towards Amazon
  • Developer is blocked from making calls for the MWS section Orders as part of MWS Deprecation process
  • Request is throttled message during orders download

Non hai trovato quello che cercavi? Contattaci

FAQ AmazonSync – Domande frequenti
  • Sync Offers – Value for ‘externally_assigned_product_identifier’ is shorter than the allowed minimum (13 characters)
  • How to check listings sync elaboration status on Amazon
  • Listings or trackings are not updated on Amazon
  • Can I import an order if the product’s SKU differs from the one on Amazon?
  • Offers are not being exported towards Amazon
  • Request is throttled message during orders download
Vedi tutto 15  
Categories FAQ
  • FAQ Danea Import 1
    • FAQ Danea Import – Prices 1
  • FAQ FastBay 33
    • FAQ FastBay – Installation 5
    • FAQ Fastbay – Configuration 11
    • FAQ Fastbay – Sync 51
    • Orders 6
    • FAQ FastBay – Error codes and debug mode 29
  • General topics 8
  • FAQ AmazonSync 18
    • FAQ AmazonSync – Domande frequenti 16

  How to check listings sync elaboration status on Amazon

Information

Prestalia by GAN srl

Strada Degli Angariari 25
47891 Rovereta,
San Marino Republic
Contacts

+39 0541 1480222
From 9:30 AM to 5:30 PM

Links
Prestalia
Buy new modules
Support
Support
  • Privacy Policy
  • Moduli Prestashop
  • Copyright 2025 Prestalia. All Rights Reserved.

Ricerche popolaridebug mode, mandatory specifications, publish first product