If we have an item master item that does not have purchasing class assigned and the item has been used previously, we encounter issues if we then add a purchasing class. Specifically, if we try to make a change to a PO line that has this item on it, we have we get an error stating "cannot use different purchase class for I and N types." This sounds easy to fix: Just change the purchasing class on the item on the PO Line, too, to match what we just assigned on the IC11.
But, the problem is we are doing this to about 2,000 items and we have thousands of open PO lines. Is there not some PO audit setting that we could change to make it "ignore" the fact that the PO line's item has a different purchasing class form what is assigned in IC11?