OSS 379769: Client & - current no. level of ADRNR 01 must be incrd to &

What causes this issue?

During the upgrade with Start Release 3.x or 4.0 and Target Release 4.5
or 4.6B/C, an address is created in central address management for all
records in KNA1 (customer master) and LFA1 (Vendor master).
The numbers required are taken from the number range interval ADRNR 01.
In clients &V1& however, the address table already contains entries
where the number is higher than the current number level.
The highest number found in interval ADRNR 01 is &V2&.

System Response

During the conversion, these entries lead to inconsistencies if numbers
from the number range interval are assigned again and these numbers
already exist in the database.

How to fix this error?

The current number level in clients &V1& must be increased to at least
&V2&.
Read note 379769 carefully, and carry out the steps described there.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.