Usa keys estables (slug técnico). Te propongo estas (puedes copiarlas tal cual):
| Label (Admin) | Meta Key |
|---|---|
| Demo URL | demo_url |
| Thumbnail URL | demo_thumbnail |
| Price From | demo_price_from |
| Delivery Time | demo_delivery_time |
| Included Pages | demo_pages_count |
| Tech Stack | demo_tech_stack |
| CTA / Buy URL | demo_buy_url |
| Featured Demo | demo_featured |