Accounting principles &1 and &2 assigned in ledger &3 company code &4

What causes this issue?

An accounting principle can be assigned at three levels:
Ledger
Company Code
Accounting principles for company codes (older, existing logic)

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

If the assignment is done at the ledger level, the accounting principle
is valid for all company codes of the ledger.
Alternatively, the accounting principle can be set for individual
company codes in a ledger, if the accounting principle is not defined at
the ledger level.
The third level is the older logic, which allowed you to assign one or
more accounting principles to a company code in a ledger.
In this specific case, there is an assignment at the ledger or company
code level as well as an assignment using the older logic. The older
assignment does not match the new assignment.

System Response

System returns an error.

How to fix this error?

Ensure that the accounting principle assignment is consistent. This can
be achieved by changing one of the assignments so it matches the other.
Also, you can remove the incorrect assignment(s).

Error message extract from SAP system. Copyright SAP SE.