Books API error code 110846

Books API error code 110846

We started receiving the following error when trying to create new sales orders with shipping charges using the api:

"code":110846, "message":"Please mention any Shipping/miscellaneous charges as additional line items.”

Where did this error come from? We have previously created orders with shipping charges with no issues.

And what does it mean? Are we supposed to create line items for the shipping charges? How can that even be done for something that is not an inventory item?

This is preventing us from putting orders into zoho and invoicing for them.