Differences between assets and G/L accts in the balance

Hi Experts ,

Could you help me to solve my issue

i have asset APC 1000 $ Have useful life  10 Month depreciation Start Date 01-01-2015

then i go through the operation and i have run the depreciation up to 30-06-2015 its calculate  accumulated   Dep= 600 $

then i have found the  one of the users has been retired the asset retroactive in 01-06-2016 [after the completion of june-2015 deprecation   ]

So when run ABST2 that i found the 100 $ as a difference , could you help how to slove my issues conidered that i have closed the previous year 2015

and there is no way tho open it and repeate the Deprciation for the mentioned asset .

Thanks in advacnes