Google and YouTube app duplicate products: why it happens and how to clean it up
Duplicate products in Merchant Center usually mean two data sources send the same Shopify catalog. Find the extra source and remove it without losing history.
The short answer
Duplicates almost always mean two data sources are submitting the same products with different IDs. Typical pairs are the Google & YouTube app plus a feed app, or the app plus an old feed or an automatic source. Pick one source to keep, stop the others from submitting, then delete the extra source in Merchant Center. Deleting alone isn't enough if something keeps re-sending the products.
How duplicates happen
Google's id attribute rules say every product and every variant needs its own unique ID, and that changing an ID overwrites the product and its history. If two integrations send the same catalog with different IDs, Merchant Center sees two sets of products.
Merchants report several routes:
- Two feeds at once. In one Community thread, 120 variant items showed as 240 and the account was suspended. The reply said to delete the duplicate feed "ASAP".
- Connecting the app to an account that already had products. In another thread, a store's count went from about 400 to over 900 after connecting the Google & YouTube app. A reply explained that duplication happens "when you accidentally submit multiple feeds that use different product IDs for the same products."
- Local feeds. A third thread describes a duplicate "Local Feed partnership" source after the merchant turned on the Google Business Profile connection in Shopify by accident. Turning the connection off didn't remove it. Deleting the source in Merchant Center did, within minutes.
Shopify's channel requirements say connecting the app overwrites an existing product feed "to avoid conflicts". The threads above show that doesn't always cover sources from other apps or Google's own automatic sources.
Duplicate variants are a different issue
If Merchant Center shows Duplicate variant, the cause is inside one source. Two items share an item group ID without a distinct size, colour or other variant value. Fix the variant options in Shopify so each one differs, or remove the extra variant.
Step 1: list your data sources
In Merchant Center, go to Settings, then Data sources, per Google's data sources guide. Look at the Product sources tab. Note each source, its upload method and how many products it has. Products added automatically from your store's structured data also appear as a source.
If two sources each hold roughly your full catalog, you have found the duplicates.
Step 2: decide which source stays
Keep the one you want to manage products from. For most small stores that is the Google & YouTube app, because it updates from Shopify. If you rely on a feed app such as Simprosys for extra fields, keep that one instead. Running both is the cause, not a backup plan.
Your ad history sits on the product IDs in the source you keep. Google's data sources guide advises uploading a replacement source before removing the old one so item IDs and history carry over. If one source has your Shopping ads history, think twice before deleting it.
Step 3: stop the other source at its origin
Turn off product submission in the app you are dropping, or uninstall it. If you are dropping the Google & YouTube app's feed, switch its product sync to manual in the app's Settings under Product feed, as Google's sync guide describes. Google's data sources guide warns that if products aren't removed from the source, they come back on the next upload.
The 400-to-900 thread shows why this order matters. The merchant deleted the Content API source twice, and both times it came back and re-imported the catalog.
Step 4: delete the extra source
- Go to Settings, then Data sources.
- On the Product sources tab, find the source.
- Open the three-dot menu under "Actions" and select Delete source.
- Confirm with Remove.
Google says items from the deleted source won't be available for Shopping anymore, and removal can take up to an hour to show in ads and free listings. If a supplemental source feeds rules in the primary one, delete those rules first.
Step 5: watch for a few days
Check the product count under Products over the next days. It should settle at your real catalog size. If the extra source returns, something is still submitting. Check every installed app with Google or Shopping in its name.
If you were suspended over this
Clean up first, then request a review. The appeal guide explains Google's limits on reviews. Google decides the outcome, and one clean source is what you can control.
At the time of writing (November 2026), these menu names match Google's help pages. Merchant Center's layout changes often.