Document & does not exist

IF &[SWITCH]S4H_DOCU_ON_PREMISE& = 'X'.
INCLUDE MB_NA_BELEG_NICHT_VORHANDEN
ENDIF.
IF &[SWITCH]S4H_DOCU_CLOUD& = 'X'.

What causes this issue?

The document you entered does not exist in the specified/current
calendar year.

How to fix this error?

Make sure your entries are correct.
ENDIF.

Error message extract from SAP system. Copyright SAP SE.