Data in your local products inventory feed references store codes that don’t exist as published locations in your Google My Business (GMB) account. This issue occurs when it’s not clear to which stores this inventory data belongs.
Note: To serve local inventory ads, make sure the codes in your inventory data match store codes in your GMB account.
You can drive more traffic to your store by serving ads when a user is shopping nearby.
How to match your stores
To match stores, compare the store codes in your GMB account with the store codes in your local product inventory feed.
If there are store codes in the feed that aren’t in GMB, add the store information to your GMB account.
Make sure locations of the store codes you reference in your feed are set to published in GMB.