Remove articleType as parameter sent to Specter on product updates. This can be useful if some articles are marked as "paketartiklar" in Specter (since WooCommerce don't have support for that).

wc-specter-remove-article-type-in-product-sync.php

<?php
add_filter( 'wc_specter_send_custom_product_data', 'my_custom_product_data', 10, 3 );
function my_custom_product_data( $params, $product, $is_variation = false ) {
	/**
	 * $params is the product data stored as an array.
	 * $product is the product object. Product variation object if this is a product variation.
	 * $is_variation is true/false depending on if this is a product variation or not.
	 */
	
	// Unset articleType type so we don't send that to Specter when product is updated in WooCommerce.
	if( array_key_exists( 'articleType', $params ) ) {
		unset($params['articleType']);
	}
	
	return $params;
}