Ledger for compat. views not unique (&1 and &2 ) for comp. code &3, &4

What causes this issue?

In the Customizing settings for <LS>Multiple Accounting Principles in
Controlling (COGM)</> where you
<DS:SIMG.V_FCML_MLCO_COFI>define the ledger that is used by the
compatibility views in Controlling</>, the following ledger setting is
not unique:
For company code &V3&, there are several entries where field "Update
Exclusively in Leading or Parallel Version" has the same value <LS>&V4&
</>.

System Response

These entries show the differing ledgers &V1& and &v2& in the "Ledger
from which CO reads actual data" field.
Within one company code, however, entries for the same "Update
Exclusively in Leading or Parallel Version" must have the same "Ledger
from which CO reads actual data".
Otherwise the compatibility views for Controlling would try to read the
data from different ledgers based on the same accounting principle,
which is not possible.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.