Alt/add. recipient: Direct input as well as correspondence activity

What causes this issue?

You entered an alternative/additional correspondence recipient with
their key. You also entered a
<DS:DE.CORR_ACKEY_KK>correspondence activity</>
for the determination of a
<DS:DE.CREC_GP_KK>correspondence recipient</>.

System Response

This input combination is not permitted.

How to fix this error?

Make changes to your entries to the effect that only one value is
filled.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.