[Support request] 2 types of Schema – Blog & Article (+ developer code)

Hi, I changed theme to Generate Press and my Google ranking dramatically dropped. I waited over a week for Google to re-crawl the new theme but the ranking didn’t improve, and continued to fall.

I asked my developer to help. They told me GP had a different schema to my old theme (though I’m sot sure what my old schema was). They then added this code:

function foundry_custom_itemtype( $type ) {
return ‘BlogPosting’;
}
add_filter( ‘generate_article_itemtype’, ‘foundry_custom_itemtype’ );

However, I now have two two schema showing and the old developer company has closed down so I can’t ask them to help.

https://search.google.com/test/rich-results/result/r%2Farticles?id=CczLlI-aEKh_8bUOX80ZPg

How do I get rid of the duplicate schema (without having a massive impact on my Google ranking)? I read this https://generatepress.com/forums/topic/about-schema-type/ but I’m not sure how this will work with the developer code (or do I need to remove that first?)

I use Yoast and my schema is set to Article (Default), which is the correct schema I want. Hope you can help!