SAP Message VSB316 - Verification step incomplete (duplicate transfer)

Diagnosis
The processing step should be started for a transfer for which theverification step is not yet complete:
When processing the verification step for IDoc &V2&, the systemdetermined that the same transfer may exist in duplicate.

System Response
The processing step can only be started when the IDoc has beenprocessed.

Procedure
Check whether there really is a duplicate transfer.
Refer to the corresponding long text for the error message from theverification step for transfer &V1&.
You will find a description there as to how to proceed.