Overall budget of &2 exhausted for document item &1

What causes this issue?

The overall budget of the availability control ledger &V2& has been
consumed for the document item &V1&. Budget control on outgoing amounts
(
<DS:DE.BUAVC_CEILTYPE>ceiling type</> <ZK>Expenditures</>) raised this
message for the following combination of availability control ledger
(and if applicable, the <DS:DE.FM_CEFFYEAR_BCS>year of cash effectivity
</>) and control object:
<ZH>&V3&</><ZH>&V4&</>
DEFINE &N& = '014'
INCLUDE FMAVC_OVERALL_MESSAGE_EXT

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.