If you are creating a new part and Orchid POS warns you that the part number already exists, you may need to check a few place. Search for the part number on:
1. Products page
2. Products page with "List Archived Parts Only" filter turned ON. Oftentimes, the part was previously part of your inventory and was deleted.
3. Other inventory types (ie Rental, Services) along with archived items there, too. Sometimes parts are moved and then deleted.