Transfer variant &1 &2: do not mix TTY for prior-yr + curr.yr (&3 und &4)

What causes this issue?

Transaction types &V3& and &V4& in transfer variant &V1& &V2& are not
allowed to be combined. One of the transaction types is for
current-year acquisitions, whereas the other is defined for prior-year
acquisitions.

System Response

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

How to fix this error?

Check the Customizing settings for transaction types.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.