Combination &1 / &2 is not allowed for manual posting for &3, &4

What causes this issue?

You want to use process / budget type combination &V1&/&V2& in FM area
&V3&. The customizing settings do not allow the use of this combination
for manual postings.

System Response

How to fix this error?

Choose a process/budget type combination that is allowed for manual
postings.

Procedure for System Administrators

If you want to change the Customizing settings, choose the Customizing
pushbutton.

Error message extract from SAP system. Copyright SAP SE.