"No update of sales order X from purchase order (error V1 154)."

I'm having an issue trying to delete a line item from a PO and then save. The error I recieve is: "No update of sales order X from purchase order (error V1 154)."
The long text says "You want to create or change a purchase order. The system attempted to update the relevant sales order item(s) in the sales order X. During this update, error message V1 154 was triggered."

 

maybe there is help in OSS note 827559 and 823393 - Purchase order w/ third-party:Credit cust blocked in order