Net book value positive in area 03 at fiscal year start Message no. AA647

Hi Experts,

Because we want to post unplanned depreciation on in depreciation area 01, I tried ABAA and input the value that we want to depreciate for the first screen. I input zero for the following screen pop-up related to other depreciations.

However, there is a depreciation key 03 whose function is valuation reserve that I cannot assess key 03 and I got the error message as title.

Is there any solution for this case?

Thanks a lot for your help.

Chih-Ming