Annual budget almost exhausted for document item &1

What causes this issue?

The current budget consumption is &V2& less than the annual budget for
the document item &V1&. Budget control on incoming amounts (
<DS:DE.BUAVC_CEILTYPE>ceiling type</> <ZK>Revenues</>) raised this
message for the budget address <ZH>&V3&</> (= <ZK>first-level control
object</>) without considering the cover eligibility rule that exists
for this budget address.
Although at this point the system checks availability on the level of
the budget address, an automatic cover eligibility rule was found. This
rule ultimately decides whether sufficient budget is available for
posting, if the present message has not been raised as an <SE><LS>Error
</></>.
The corresponding cover eligibility rule is determined by the following
combination of availability control ledger, fiscal year (and if
applicable, <DS:DE.FM_CEFFYEAR_BCS>year of cash effectivity</>) and
<ZK>second-level control object</> (<DS:DE.FMCE_CVRGRP>cover group</>
and if applicable, the <DS:DE.GM_GRANT_NBR>grant</>):
<ZH>&V4&</>
DEFINE &N& = '056'
INCLUDE FMCE_ANNUAL_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.