Diagnosis
Asset &v1& sub-number &v2& already has values.

System Response
Asset &v1& - &v2& cannot be deleted.

Procedure
If the asset has not been posted, but received values during thetransfer of data from your previous system (not tranactions) then youcan follow this procedure: Delete the transferred values using thetransaction for changing old assets.
You may need to temporarily remove the setting of the indicator"recalculate depreciation in past years" in certain depreciation areasin company code &v3& . This is done in FI-AA Customizing.
Then physically delete the group asset.