rcanny

H Emanuela,
Yes, that is the issue. When I turn off the WPSSO plugin, then your plugin works correctly for mpn.

https://pasteboard.co/J5tfhMz.png

I’ve turned off WPSSO Schema JSON-LD Markup (Premium) for the moment and will refer the developer of it to this thread.

Thank you!

Information from the other WPSSO plugin which is
https://wpsso.com/docs/plugins/wpsso/installation/integration/woocommerce-integration/
says:

“If you use the Product GTIN (EAN, UPC, ISBN) for WooCommerce or WooCommerce UPC, EAN, and ISBN plugin, the “Product GTIN Attribute Name” and the “Product GTIN Custom Field” options in WPSSO Core Premium will be disabled (as the supported plugin becomes the source of all product GTIN information).”

However maybe they are not or maybe they are rearranging the structured data from your GTIN plugin?

Hi. Thanks for the reply! Yes, that’s what I did, and that’s what I expected to see. But when I do that for both a simple product and for a variable product, it’s getting added to the GTIN field, not the MPN field

Here’s the new one I just made:
https://pasteboard.co/J5t8cuM.png

And here’s my settings where I have selected mpn:
https://pasteboard.co/J5t9XhT.png

I am also using WPSSO Schema JSON-LD Markup plugin. Maybe this is causing the problem?
Thanks very much for your help.