If you're thinking about reusing anchor holes in concrete, there are a few things you should keep in mind. First of all, the hole must be big enough and deep enough to accommodate the new anchor. Secondly, the old hole may not have good threads anymore, so it's important to check that before you start threading in the new anchor. Finally, make sure to clean out any debris from the old hole before installing the new anchor.
Assuming all of those criteria are met, yes, you can reuse an anchor hole in concrete. Just be aware that the old hole may not be as strong as a brand-new one, so take that into consideration when choosing your anchors and fasteners.