Elec. fiscal document for doc. &1 numbered and sent to messaging system

What causes this issue?

SCAN is active in your system, and you have customized the
<DS:SIMG.J_1BSERIES_NFNUMBER>Assign Numbering and Printing Parameters
</> activity, indicating that the electronic fiscal document should be
numbered via the <LS>Monitor</> report, and RFC executed via batch
report.
However, for SCAN, the electronic fiscal document numbering and the RFC
execution should be done in one step.

System Response

Electronic fiscal document is numbered and sent to the messaging system
via <LS>Monitor</>.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.