Transaction type for the legacy data for Auc

Dear Experts,

When i use the AS91 to load the legacy for Auc, the system issues the error ' Trans. type 900 can only be used for legacy assets from prev. years'

The asset value data is '2011/04/05', the transaction type is 900. The asset transfer data is '2011/04/25'

Should I have to use the transaction for the Auc's legacy data input? Can i choose other transaction tpye like 100?

Br

Sophie