Thanks for the prompt reply, @Michael Jackson. Allow me to chime in and help you with the purchase order created in QuickBooks.

Since the item hasn't been receipts, we can delete and recreate the purchase order created. This way, we can check if there's a bug with the purchase since you changed it from non-inventory to an inventory item.

Before doing so, make sure to list the details of your purchase order and use the same PO no. Let me guide you through the process:

1. Go to the Expenses menu and click Expenses.
2. Locate the Purchase Order created.
3. Tap the Delete button in the drop-down arrow.
4. Click Yes to Confirm.
   

Once done, you can now recreate the purchase order again. For complete steps, follow this article: Create and send purchase orders in QuickBooks Online. Then, check the open PO value again

For reference, you can also look into these articles on how to manage your inventory in QuickBooks Online:

• Set up and track your inventory in QuickBooks Online
• Adjust inventory quantity on hand in QuickBooks Online

If you have any other queries about purchase orders in QBO, you can always add them in your reply. I'll be more than happy to work with you again. Keep safe.