Error 8021 — Missing or incorrect parent SKU

A child row references a parent SKU that doesn't exist in the feed or in the catalog.

Submitting child variants before the parent, or typo in parent_sku reference.

1. Confirm the parent SKU exists in the feed (in the same submission) or in your active catalog.
2. Submit parent rows before children, or include both in the same feed.
3. Match parent_sku exactly — case and spacing matter.

• Children submitted in a different feed batch than parents