You are trying to create a sales order with a product, but when you input the product's ID in the field, the error message "Item XX: product exists more than once; select from value help" occurs (where XX stands for the line item number).
- SAP Business ByDesign
Reproducing the Issue
Create a Sales Order via the Webservice.
Error: Item Product exists more than once; select from value help
The Product XYZ (XYZ refers to the Product ID) is present as a Product and a Service, with the same ID XYZ.
Pass the TypeCode value, in the Request XML.
Type Code 1 for Products and TypeCode 2 for Services.
"Product", "Service", "Typecode", "Sales Order", "Webservice" , KBA , AP-SLO , Sales Order Processing , Problem