Diagnosis
Transaction type &V1& is a reversal transaction type, and thereforecannot be used for legacy data transfer.

Procedure
Net out the reversal transaction and the original transaction.
Example:
Acquis. per 03/31/19xx 1,100.00
Credit memo per 04/30/19xx 100.00-
When transferring legacy data, you can only transfer the netacquisition of 1,000.00 per 03/31/19xx.