eBay Error 21916600: Missing required variation specifics.

Why this happens

A variation listing was sent without the variation attributes (for example Size or Color) that define each variation, or a variation is missing a value for one of them. Why eBay enforces this: eBay needs every variation to have a value for every attribute used by the listing. Missing values mean buyers cannot select that variation. When it usually happens: It usually appears when a new attribute, such as Material, is added to some variations but not others.

How to fix it

This error in other languages

German: Erforderliche Variantenmerkmale fehlen. French: Caractéristiques de variante obligatoires manquantes. Italian: Mancano le specifiche delle varianti obbligatorie. Spanish: Faltan características de variante obligatorias.