Hi,
What magento are you using ?
error like this :
Apr 4, 2019, 2:44:44 PM
Revise Product on Channel
The Quantity must be greater than 0. Please, check the Price, Quantity and Format Policy and Product Settings.
And that's when i try to Stop ITEM that's sold out on different channel
QTY is useful if you have magento 2.3 and Salable Quantity .