SAP Message AO006 - Enter an appropriation request number between &2 and &3

Diagnosis
You chose external number assignment for the appropriation requesttype. Appropriation request number &V1& is not in the allowed rangebetween &V2& and &V3&.

System Response
The system expects you to change your entry.

Procedure
Enter an appropriation request number that is in the allowed rangebetween &V2& and &V3&.
When you use external number assignment, the system does not provideinformation about appropriation request numbers in the number rangethat have already been used. In order to see numbers that have beenassigned already, open a second session and use the matchcode forappropriation requests.