Can nor Revise my Items

[laska-shoes]

For 2 weeks I can't Revise my products. Every time when I try to this a got a mistake "The UPC field is missing. Please add UPC to the listing and try again". But what I have to do if I do not have those codes???
Previously, it was not a problem

[berserkerplanet]

You need to post File Exchange questions in the https://community.ebay.com/t5/Tools-Apps/bd-p/tools-apps-db forum.