AS92 - why current year depr field is grayed?

Hello guys,

background:

1. I opened new depr area 02 for existing assets. I chose that 02 has no values.

2. I try to put values through AS92, because my target in the end is to use LSMW to load values for depr.area 02.

3. in AS92 I can put acquisition value and previous years depr. value, but the current year depr value field is grayed.

Question:- why and how can I open it?

If it is not possible to open, then probably I will need to use transaction entries in AS92. Please share your experience.

Thank you.