Standard partners (SP, SH FA) specified as additional partners

What causes this issue?

Specifying standard partners (SP = sold-to party, SH = ship-to party,
FA = forwarding agent) as additional partners is not supported in the
system.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

There are special parameters available for these partners.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.