The easiest way to re-create it is to create a new item by copying an existing item. The new item will have the originals' default picking sequence but will show on demand for all locations. It can be fixed by selecting the activate button. I think importing an adjustment file with a positive and negative quantity for each item is the easiest way to fix it, unless you have a better idea?
Thanks
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Mike Smith
Viktorian Sheet Metal Mfg Inc