If your item file was originally created in another accounting system, it had a purchase order subsystem within its Inventory Control that might have set this figure. Your Adagio consultant likely has a tool that will be able to set this number to zero.
That's the funny part, we migrated from ACCPAC which also never had a PO module.
Anyway, I'd love to get my hands on said tool. I'm my own consultant but have never needed/heard of such a tool.
Anybody know where I can get it?