Error Code 21920277
Some item specifics were renamed as per eBay recommendations.
eBay sometimes changes the item-specific details to describe more accurately how the items are related.
For example, a listing for a kitchen faucet may have previously used “Type” to describe the variations “Stainless steel”, “Rubbed Bronze”, and “Chrome”. This could be updated to “Finish”
Please update the item specifics for the products that receive this error by referring to the following articles.
How to Set Item Specifics for eBay from Product Level