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

What causes this issue?

Instead of using the <ZK>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.

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

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.

Error message extract from SAP system. Copyright SAP SE.