Invalid account assignment of the availability control ledger &1

What causes this issue?

The derivation strategy &V2& derives an invalid account assignment of
the <DS:DE.BUAVC_ALDNR>availability control ledger</> &V1&: the value
&V4& of the derived account assignment element &V3& is not valid.

System Response

Availability control processing stops.

How to fix this error?

Check the derivation stratregy &V2& used for deriving the account
assignment of the availability control ledger (control object) in the
IMG activity <DS:SIMG._ISPSFM_N_FMAVCDERIA>Define Derivation Strategy
for Control Objects</>.

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.