Amortize Adjustment by negative value

Hi!

I've a problem in 12.2.8 OeBS with Fixed Assets, Amortized Changes are allowed. Case:

1. I added via mass additions interface the asset in current period (APR-20) with DATE_PLACED_IN_SERVICE = JAN-19, Cost = 1200, Life in months = 60 months, Prorate convention Same months, with linear depreciation method.

2. OeBS depreciated this addition 1200/60*15 = 300, therefore NBV = 900

3. Then I tried to do an amortize adjustment by -1000 with amortization_start_date = JAN-20. I expected that OeBS depreciate this adjustment by:

     a) -1000/(60-12)*3 = -62,5 in this case Cost = 200, Deprn reserve = 300 - 62,5 = 237,5. And then when I run depreciate NBV will be 0.

     b) or -100 that the new NBV will be 0.