Amount Base depreciation calculation

Hi Experts

Can somebody help me to solve an issue on FI-AA.

We have an asset depreciated completely but it doesn't retirement yet. So, I want to transfer an amount to it from another asset through TCode ABUMN within same fiscal year.

Asset A

Acquisition value 500,00

Captalized on 07/01/2016

Use life 5 years

On 07/01/2021 the asset A will be depreciated completely.

So, In that date I going to transfer from asset B to asset A, an amount of 10.000.00.

Currently the system behavior is to add the two values (500,00 + 10.000,00 = 10.500,00) as base calculation for depreciation and make a recalculation.

I need that Amount base for calculation depreciation is performed only for the 10.000,00 and not for sum of 10.000.00 + 500,00, as the system is making.

Somebody can help to make the system behave as I want?

Best Regards.

Jandoval Nascimento.