3698232 - Error Occurs While Maintaining Input Service Distribution Invoice Posting Settings

Error occurs "Target key must be different from source key" in input service distribution invoice posting settings.

SAP S/4HANA Cloud Public Edition

1. Go to implementation activities
2. Attempt to map multiple tax codes for the same combination of company code and business place in the "configure ISD invoice posting settings" 
3. Observe the error

• The original ISD invoice can have any tax code; however, the distributed invoice created for a business place will always have a single tax code.
• No separate configuration is required for tax codes; everything is considered for distribution by default.
• The purpose of "configure ISD invoice posting settings" is to ensure that the distributed invoice is updated with a single tax code (e.g., IGST, CGST, SGST, etc.).
• The configuration does not allow multiple entries for the same combination of company code and business place.

input service distribution, ISD process setup, configure ISD invoice posting settings, single tax code, multiple tax codes, company code, business place, tax code mapping, incorrect transfer posting, IGST, CGST, SGST, SAP S/4HANA Cloud Public Edition, target key, source key , KBA , FI-LOC-MM-IN , India (aka XX-CSC-IN-MM) , Problem