SAP Message BK070 - You cannot have internal numbering for transaction &

Diagnosis
The business transaction here is named &v1&. This has not yet beenassigned an internal number range in controlling area &V2&, meaning theSAP System cannot assign any document numbers.
You assign the number range using the maintenance transaction incustomizing.

System Response
Processing is terminated.

Procedure
Maintain an internal number range for this business transaction.
Alternatively, do not assign an internal number; use external numbersinstead.
Or, correct the controlling area entry.