I'm stuck with an issue all day long and it seems I cannot solve it. I created my own export file for products and choose the option for it to be importable again. After I export the file with products (XML), I open it as a table in excel (excel 2013), then I make edits to stock, save it as XML Data and try to import it back to our website, but we get an error and we cannot understand what is the issue with it. If we try to import the XML file that was exported withour opening it with excel or making any changes then there is no problem.
So I'm thinking that excel brakes the schema or file somehow 🙁