Item specifics are characteristics of a product such as brand, size, color, type, model, and so on. They are used to describe your items to buyers and help them find your products.
eBay does not allow to change eBay item title/subtitle/duration/private listing flag if...
eBay is changing to a monthly billing cycle for fixed-price GTC listings as of the 1st of July 2019.
eBay allows revising items QTY to 0 only if you use Out Of Stock feature.
Check this article to find out the reason for the Gallery image may not be displayed in eBay search results.
eBay implemented some changes which affected updating of the Items which have Self-Hosted images.