Multiple acctg princ. in CO (COGM): accounts approach used in CoCode &1

What causes this issue?

Instead of using the <LS>Multiple Accounting Principles in Controlling
(COGM)</> function with the <ZU>ledger approach</>, you are using the
accounts approach which is not supported in SAP S/4HANA. You probably
have implemented this using one of the following methods:
you defined a
<DS:SIMG.V_FCML_ACCMAP_AP> mapping of cost elements to G/L accounts</>
for company code &V1& or for company code '*'; or
you
<DS:SIMG.BADI_FCML_ACCOUNT_MODIFICATION> implemented a BAdI</> that
could do such a mapping.

System Response

The mapping of a cost element to a different G/L account is not
supported. The account used must be identical in Controlling and
Financial Accounting.

How to fix this error?

Please delete the mapping and/or the BAdI implementation.

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.