Hi Shriya
1) Since Depreciation is posted and you want to write back, you need to do ABZU (Asset Write Up)
2) Create a Copy of the Standard TTY 700 and Restrict it to Area 20 Only. (AO78)
3) Now when you do ABZU, it will post to Area 20 Only.. But then it will post to FI also..
4) If you want to avoid FI posting, change the Posting Indicator of this Area 20 in OADB to 0 before you do ABZU.
Ideally, you should not have posted manual FI entries. When you do ABZU, it will auto post into FI. So either you reverse what you manually posted in FI or Change OADB indicator to 0 before ABZU
Regards
Ajay M