System Calculated wrong depreciation when we change the category for asset

Hi Experts,

regarding this issue , i am taking an example to explain this scenario that i create an asset in the year of 2010 and assign category as (P&M) with depreciation rate as 1.5% and in the year of 2012, i changed the category for this asset to (R&B) with depreciation rate 2.5%.
when i run the depreciation for this asset now then  system calculates the depreciaton and what ever the difference in the depreciation rates (2.5% -1.5%) are available in the current month , system calculates the depreciation difference amount from starting date of an asset.
i dont want system should do the depreciation difference while we change the categories.