How to change the Accumulated depreciation of an Asset without affecting YTD depreciation

Hi,

I'm in Oracle R12.1.3

How to change the Acumulated Depreciation of an asset (which is in use) without affecting its current YTD depreciation.

Reason: At the time of Asset loading into the FA, incorrect sum of the accumulated depreciation  was entered.

For Example,

Asset Cost - 3,00,000 (Original Cost)

Total Correct Accumulated Depreciation (in Legacy System) - 90,000

Incorrect Accumulated Depreciation was entered in Oracle FA- 70027.40

(This incorrect accumulated depreciation was entered in Feb - 14)

So far, the  YTD Depreciation in Oracle has been calculated as 7479.45 (i.e. Apr 14 - Jun 14)

Now, here I want to change/correct  the Accumulated Depreciation to 90,000 + Current Year YTD i.e. 7479.45 = "97479.45"