While not a 5x module, the upgrade5.mvc is used to export data from the 4x store so it can be imported into the 5x store.
A product which is not to be tracked for inventory is erroneously listed as Yes for tracking inventory in the provide.xml file. So when imported, a product that was not to be tracked in 4x is now being tracked in 5x. Hence, it is automatically out of stock. You have to manually go back in and turn off inventory tracking for those products that were not supposed to be tracked.
A product which is not to be tracked for inventory is erroneously listed as Yes for tracking inventory in the provide.xml file. So when imported, a product that was not to be tracked in 4x is now being tracked in 5x. Hence, it is automatically out of stock. You have to manually go back in and turn off inventory tracking for those products that were not supposed to be tracked.