GSC Merchant listings error: ProductGroup.description too long (JSON-LD) – excee

Hello Nicolas,
I’m getting Google Search Console emails for Merchant listings / structured data:

“The length of the string value for field ‘description’ is invalid (in ‘<parent_node>’).”

On this product page, HikaShop outputs JSON-LD with @type: "ProductGroup" and the description field contains almost the entire long product content (tables + FAQs + full copy), so the string exceeds Google’s 5000 character limit for description.

URL: www.hermanosgaliano.es/comprar/papel-secamanos

In the page source:

@type: "ProductGroup"

description: "<very long text…>" (over 5000 chars)

Could you please update the structured data generator so that:

ProductGroup.description is capped to <= 5000 characters (ideally 500–1000), and

optionally strips HTML / excessive whitespace, or uses a shorter “short description” field if available,
so it complies with Google Merchant/structured data requirements and avoids GSC errors?

Thanks!

Additional GSC warning to address (missing field):
Google Search Console also reports: “Missing field productGroupID (in <parent_node>)”.

In your JSON-LD output, the parent node is @type: "ProductGroup". Please include a stable, unique productGroupID in that ProductGroup node (e.g., the parent product SKU or the internal HikaShop product ID), so it complies with Google Product variants structured data requirements.

Thanks so much.