Item ID is a Required Field
You may get this error when you try to post an order to your sales channel.
To resolve the above error you need to download the data from scratch in Webgility and then try again to post the order to the sales channel.
To download the data from scratch, please follow the below steps:
1). Navigate to Advanced Settings by following Integrations> Stores> Advanced Settings.
2). Under Application navigate to the Last download date for Store Items, Click the Clear button, Save the settings, and close.
3). Next you will need to download the latest product data in Webgility from the product catalog by going to Products > All Product (under the sales channel on the left side) > Refresh button.
This process may take several minutes to complete. Once it is completed,
A dialog box will appear with the confirmation message.