Item arrival will merely show you expected arrival from various sources; it doesn't add any on its own. On the screenshot, all the arrivals are from purchase orders (see the Reference field), which is something that 지박-24120504-0 doesn't want, but as I mentioned, there are other possible sources as well, such as transfers.
Where do the items come from if not from a purchase order? Is it, for instance, a transfer from another warehouse or a return order?
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