Diagnosis
Transaction type &V1& cannot be used for the offsetting posting of aretirement transfer.
The transaction type for the offsetting entry has to be an acquisitiontransfer transaction type, and has to have the same current-yearacquisitions indicator. Both of these features are specified in thetransaction type group. The current-year acquisitions indicatorspecifies whether you are transferring acquisitions from the currentfiscal year, or acquisition from previous fiscal years.

Procedure
Check your entry, and use an appropriate transaction type for theoffsetting entry.
Check the Customizing definition of the transaction type.