Hi,
According to me, once the Planned Depreciation is posted, you cannot reverse the same.
In this case you can post the same amount of planned depreciation as Unplanned Depreciation using T-Code 'ABAA'. You have to create a new Transaction type for this in which the Asset value gets debited and the accumulated depreciaiton gets credited. By this your issue will be resolved.
Regards,
Malhar.
