If you create/edit a catalog product that already exists, Catalog will:
Supplement blank fields on your existing item.
Override existing fields with new fields.
Blank fields will not override an existing value
See Zonospolicies and agreements.
Update products in Catalog
Edit your products via the Catalog API or Zonos Dashboard.
Catalog's Edit Products feature enables you to update your existing products with additional or updated information efficiently. Instead of having to delete and re-upload the product, you can upload the updated information, and Catalog will match it with the existing product using the catalog identifier (SKU/Product ID). This way, you can keep your catalog up-to-date with minimal effort, whether you use the Dashboard or the API to create new products or edit existing products.