Net book value is not Zero after useful life of the asset

Hello All,

We have created new assets in R/3 system and posted acquisition against the asset. Able to see the Net book value at the end of asset life is Zero.

If I change the depreciation start date to before acquisition date i.e. Asset Capitalization date is April 1st, 2021 and updated depreciation start date to April 1st 2020. Now my NBV at the end of the life is not Zero. Verified scrap value settings and cutoff value key and all these are Blank.

Let me know how to make the value as "Zero".