Hi Siva,
As shown above in your snapshot Ordinary Depreciation Start date is 01.07.2009, now as per your go live date and fiscal year start, please calculate and confirm, expire useful life and migration figures (Accumulated depreciation 3246 and posted depreciation 312). It seems that either your expire useful life or migration figure were not migrated correctly.
Please also check in AFAMA that you are not using the depreciation to the no of day.
Please also check others assets with the same dep. key, and their monthly plan dep is same or its also changing like this asset number.
Regards
Javed