low inventory fee on used items, and items out of stock at supplier level?

Amazon just introduced the “minimum inventory” column in the FBA inventory report. I’m seeing a “minimum inventory” value for items that are not able to be replenished due to the supplier being out of stock (which I expected, but not sure what to do about it) but also for used items??? Does Amazon actually expect us to keep regular stock of used items? This can’t be correct. By the very nature of them, they can’t be replenished. Thoughts?