GTIN & ManufacturerKey Validation Guide for Product Feed
This page explains the "Not valid GTIN (8-14 numbers) or ManufacturerKey" validation error in the Digitec Galaxus Integration. If products are being excluded from your feed and you see this error in the Items grid, this guide covers what the validation checks, why it fails, and how to fix it. Understanding these requirements helps keep your product feed clean and accepted by Digitec Galaxus.
What This Error Means
Digitec Galaxus requires every product to be uniquely identifiable. As part of their marketplace requirements, each product must have at least one of the following:
A valid GTIN (Global Trade Item Number) — between 8 and 14 numeric digits
A valid ManufacturerKey — the manufacturer's own product number, unique within each brand
This is a Digitec Galaxus marketplace requirement, not just a module-level validation. Products without a valid identifier cannot be listed on the marketplace. The module enforces this upfront so invalid products are caught before the feed is sent, rather than being rejected by Digitec Galaxus after upload.
If both are missing or invalid, the product fails validation and is excluded from the feed with the error:
Not valid GTIN (8-14 numbers) or ManufacturerKey
Why Digitec Galaxus Requires This
Digitec Galaxus uses GTIN and ManufacturerKey to match your products to their catalog. Without a valid identifier:
The product cannot be matched to an existing listing on the marketplace
Digitec Galaxus will reject the product during import
Orders and stock updates won't work because there's no link between your catalog and theirs
The ManufacturerKey serves as an alternative when a product doesn't have a standard GTIN — for example, custom products, private-label items, or accessories without an EAN. The ManufacturerKey must be unique within each brand.
How the Validation Works
The module checks in this order:
Is a ManufacturerKey present? If yes — product passes, GTIN is not checked.
If ManufacturerKey is empty — check the GTIN value:
Must be numeric only (no letters, spaces, or hyphens)
Must be 8 to 14 digits long
So the error only triggers when ManufacturerKey is empty and the GTIN is missing or invalid.
Common Causes
Cause
Example
Fix
GTIN attribute is empty
No EAN entered on product
Add the EAN/GTIN to the product
GTIN contains non-numeric characters
EAN-5901234123457 or 590 123 412
Remove letters, spaces, hyphens
GTIN too short
123456 (6 digits)
Verify correct EAN — must be at least 8 digits
GTIN too long
123456789012345 (15 digits)
Check for extra digits or concatenated values
Wrong attribute mapped
SKU used instead of EAN attribute
Update GTIN attribute mapping in config
ManufacturerKey attribute empty
No manufacturer number set
Add ManufacturerKey or ensure GTIN is valid
Valid GTIN Formats
These are all accepted:
GTIN-8 (EAN-8): 8 digits, e.g. 96385074
GTIN-12 (UPC-A): 12 digits, e.g. 012345678905
GTIN-13 (EAN-13): 13 digits, e.g. 5901234123457
GTIN-14: 14 digits, e.g. 15901234123457
How to Fix
Step 1: Check Your Feed Output
Start by disabling data validation so you can inspect what the module is actually sending:
Go to Digitec Galaxus → Product Data → Advanced
Set Enable Data Validation to No
Regenerate the feed
Open the CSV and check the GTIN and ManufacturerKey columns
This tells you whether the correct attribute values are being used. Common findings:
Columns are empty — the mapped attributes don't have values on your products
GTIN contains SKUs instead of EANs — the default mapping uses sku, which is likely not your EAN attribute
Values look wrong — the wrong attribute is mapped
Once you know what's in the feed, pick the right fix below.
Option 1: Fix the Attribute Mapping
The GTIN attribute defaults to sku. If your EANs are stored in a different attribute:
Go to Digitec Galaxus → Product Data → Stock & Pricing
Update the GTIN field to point to the correct attribute (e.g. ean, barcode, or a custom attribute)
Do the same for ManufacturerKey if needed
Regenerate the feed
Option 2: Fix the Product Data
If the mapping is correct but products are missing values:
Go to Digitec Galaxus → Items in the admin
Filter on products with validation errors
Edit those products in the catalog and add a valid EAN/GTIN or ManufacturerKey value
Regenerate the feed
Option 3: Add ManufacturerKey
If your products don't have GTINs (e.g. custom or private-label products):
Navigate to Digitec Galaxus → Product Data → Stock & Pricing
Ensure ManufacturerKey is mapped to an attribute that contains the manufacturer's product number
Fill in that attribute on the affected products
Regenerate the feed
Troubleshooting
Mapping looks correct but products still fail
The attribute mapping in the module config (e.g. EAN / GTIN code → EAN) may be set on a specific store view. If the feed generates for a different store view, the mapping might not apply.
Check: Make sure the EAN/GTIN attribute mapping is configured for the store view that the feed is generated for, not just the default scope.
Product has a valid EAN but still gets the error
The EAN attribute on the product may have a value, but the feed might not be picking it up. This can happen when:
The attribute mapping is set at store view level and the feed runs on a different store view
The product's EAN value is only set on one store view but the attribute scope is store view (not global)
Check: Open the CSV (with validation disabled) and verify the GTIN column actually contains the expected EAN value for the affected product. If the column is empty despite the product having an EAN, the mapping or scope is the issue.
Magmodules sets the bar for Magento module quality and support—we check their catalog first for client feature requests, and they’re our first choice for licenses.
11 Nov 2025
Matt Austin
Possibly the fastest support response times of any Magento Extension vendor. Great extensions too!
09 Sep 2025
Jan Privé
Dankzij de heldere uitleg en snelle reactie van Magmodules kon mijn vraag, en dus mijn Magento-probleem, binnen enkele uren worden beantwoord.
Doeltreffend, zonder moeilijke termen, gewoon zo als het zou moeten zijn....
Bedankt!
05 Sep 2025
Denis Metzler
To evaluate a provider, it is not enough to consider only the product offered, but also its after-sales service, such as support and troubleshooting. Magmodules has been extremely satisfactory at all levels on multiple occasions and sets the bar at the top when comparing the competition.
02 Sep 2025
Bleijenberg winkelinrichting en materialen
Goed bereikbaar, reageren snel en denken oplossingsgericht. Een aanrader.
30 Jul 2025
Patrick Verduijn
Magmodules biedt plugins aan die van hoge kwaliteit zijn tegen een goede prijs, waar dit bedrijf in uitblinkt is de bereidheid om de zeldzame feedback & problemen met de plugins te willen onderzoeken, mee te willen denken in het debuggen van problemen en goede oplossingen toe te passen.
In mijn decennium ervaring met Magento & 3th parties is Magmodules absoluut een uniqum binnen de markt.
25 Jul 2025
Erik de Groot
Magemodules heeft hele sterke Magento extensies en een proactieve support. Al jaren heel erg tevreden over jullie service en producten!
18 Jul 2025
René Zeuner
We are using the Mollie Magento extension from Magmodules. It works excellently without flaws. Very fast, competent and friendly support. Thanks!
30 Jun 2025
R. U.
Erg goed team, reageren snel en duidelijk en hebben met toegang tot onze database erg goed geholpen (eigenlijk een gratis customization).
18 Jun 2025
Hugo de Groot
Uitstekende support! Wij gebruiken o.a. de Rich Snippets Suite extensie voor onze Magento 2 webshop (Hyvä) en hadden een specifieke vraag over structured data op PLP-pagina’s. Binnen no-time kregen we een inhoudelijk en duidelijk antwoord. Zeer prettig contact en goed onderbouwde uitleg. Absoluut een betrouwbare partner voor Magento-extensies!
