Different determination account for revaluation in previous-current year

Hi,

I am trying to define diferrents account in 'Specify Accounts for Revaluation of Current Year's Depreciat' (AO93) and 'Specify Accounts for Revaluation of Previous Years' Deprecia' (AO97). The problem is that when I change the account in one TS automatically is changed in the other TS, so it does not have sense because i can not make the difference between previous and current year.

Thanks,

Cecilia