If you need to reset the inventory quantities on your wheel, all you have to do is copy your Result Set.
Copying your Result Set
Navigate to Prize Manager > Manage and follow these steps:
Click the Copy button next to your result set
Name your new Result Set
Choose between starting out with the remaining inventory or starting with the original inventory values
Make your Result Set live and click Copy.
Your wheel is now ready to go with a new inventory! All spins from the previous Result Set will be saved and can be accessed by clicking the Download button or clicking on its name.