Reversing ABUMN transfer via AB08 does not increase the original asset quantity.

I mass(SLMW) transfered lots of assets with ABUMN. When doing it decreased original assets and increased quantity of new asset. Now I need to reverse this operation but doing it with AB08 do nothing about quantity. Orinal asset is still 0 quantity and new asset's quantity still 1. Do I have to update quantities manually? Are there any better way to reverse this operation?