1) Make sure the bar codes are GS1 registered, any other bar codes are not valid and should be removed
2) If the manufacturer has assigned a bar code, then set GTIN, Brand and MPN values and set Identifier Exists to yes.
3) If the manufacturer has not assigned a bar code, then remove GTIN, Brand and MPN values and set Identifier Exists to no.
For 2 and 3 Check your data feed supplier documentation how to achieve this or contact support.
4) You can also if point 3, clear the data using feed rules: https://support.google.com/merchants/answer/7450276?hl=en
You need to ask your manufacturer, If you are not the manufacturer you can't create GS1 bar codes.
Get in touch with your data feed supplier support team.
Otherwise, use feed rules, more info: https://support.google.com/merchants/answer/7450276?hl=en-GB
If the app you are using is from Shopify, then you need to use Feed Rules. Please read the documentation as per previous posts.
I am also getting "Invalid Barcode". The barcode was assign per a barcode app. I received about 380 errors on barcodes alone. The items are dropshipping item and some are print on demand. I got the first barcode error before I put a barcode on them. Now I am having trouble with barcode error. Does anyone have any ideas?
As per previous post, the solution is to clear the attribute barcode and brand, and set identifier exists to no.
To do this you need to use feed rules. You can read how to do this here: https://support.google.com/merchants/answer/7450276?hl=en
Alternatively, if you want to use an app with custom functions that allow you to easily edit all attribute data, consider using my application. Which has me as a specialist behind you helping you every step of the way.