Business validation error: The action could not be completed because another user was creating, editing or deleting a transaction with inventory products at exactly the same time.
This article helps Webgility Desktop users resolve "Business validation error: The action could not be completed because another user was creating, editing or deleting a transaction with inventory products at exactly the same time." error. This happens when posting orders from Webgility Desktop to QuickBooks Desktop. It explains that the error occurs when multiple users are simultaneously creating, editing, or deleting transactions involving inventory products in QuickBooks Desktop, and provides steps to ensure only one user is accessing the transaction at a time to complete the posting successfully.
Overview:
You may get this error when another user of QuickBooks Desktop works on the same transaction in QuickBooks Desktop from any other computer.
Error Message:

Resolution :
- Make sure that no one is currently working in your QuickBooks Desktop. Wait for some time and then attempt the task again.
- If the issue persists, close the QuickBooks company file on all the other machines and try to post the order.
- If all options fail, try switching to Single User Mode in QuickBooks Desktop, then re-try posting the order via Webgility Desktop.