Read the final item in Merchant Center
Open one affected variant and record its item ID, data source, feed label, language, country, brand, GTIN, and MPN. Do not rely only on the status shown inside Shopify.
Shopify → Merchant Center
MPN saved in Shopify, but missing from Merchant Center variants?
Prove which layer dropped the value: the Shopify variant, the Google & YouTube channel, another feed source, or Merchant Center's final item. Start with one affected variant before editing the catalog.
Confirm the Shopify variant value
Check the exact variant rather than the parent product. Confirm whether the value is a real manufacturer-assigned MPN, not an internal SKU copied into the field.
Identify which source owns the item
If Merchant Center receives both the Google & YouTube channel and a third-party or supplemental feed, compare the final item's source before blaming a Shopify field.
Compare IDs without rewriting them
Parse Shopify-style IDs and match the affected-products CSV back to the submitted feed. An unmatched ID often means you are comparing two namespaces, not that the MPN vanished.
Safe boundary
Diagnose the source before changing identifiers.
Changing an item ID can create a new Merchant Center product and disconnect historical performance. Keep IDs stable, correct only the source that owns the affected item, then allow time for Merchant Center to process the update.
Parse Shopify item IDsFrequently asked
Before editing MPNs in bulk.
Should I use my Shopify SKU as the MPN?
Only when that value is genuinely the manufacturer-assigned part number. Google warns against guessing or submitting an internal SKU as an MPN when it is not the manufacturer part number.
Does every variant need a different MPN?
Use the most specific manufacturer-assigned MPN available. Variants that are different manufacturer products, such as different colors, may have different MPNs. Do not invent values to force uniqueness.
Can FeedPatch force the Google & YouTube app to sync an MPN?
No. FeedPatch does not connect to Shopify or Merchant Center and cannot change channel-app behavior. It helps identify the exact affected item ID and source row so you can prove where the value is missing.
What if the Merchant Center item ID does not match Shopify?
First identify the active data source. A Shopify channel item may use a shopify_LABEL_PRODUCT_VARIANT ID while a custom feed uses another ID. Parse and compare one affected variant before changing the whole catalog.
Are my files uploaded?
No. The FeedPatch parser and affected-products matcher run in your browser. Aggregate action counts are recorded, but pasted IDs and CSV contents are not sent to FeedPatch.
Optional repair export
Trace affected rows free. Upgrade only for repeat feed repair.
The ID parser and affected-products matcher stay free. Pro adds full-feed normalization downloads after you have confirmed the real source problem.
$79USD
per year
per year
- Free affected-products row matcher
- Free Shopify item ID parser
- Full-feed safe normalization export
- 14-day refund policy
Official references
Use manufacturer identifiers accurately.
Google MPN [mpn] specificationWhen an MPN is required, formatting rules, and why guessed values can lead to disapproval.Google product data specificationID, GTIN, MPN, brand, and identifier-exists requirements for Merchant Center items.
Checked against Google Merchant Center Help on August 28, 2026. FeedPatch is independent and is not affiliated with Google or Shopify.