Internal number for turnovers is in the critical range

What causes this issue?

The internal number for turnovers is a unique technical key that is
assigned internally. The numbers are taken from number range interval
'01' of the corresponding number range object. The number range status
of number range interval '01' has reached the critical range, in which
the system gives a warning each time a new number is used.

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?

Reorganize if required number range interval '01' of the number range
<DS:SIMG.SIMG_CFJB0BJB_VTNUMI>Maintain Number Range for Internal
Transaction Key</>

Error message extract from SAP system. Copyright SAP SE.