If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
We have some reservations created automaticlly by system (or manually). But these reservation doesn't work. the stock still can be consumpted by regardless the current reservation. It makes no sense.