Howto: copy dbr files?

I copied a .dbr file in

…Grim Dawn\WORKING\database\records\sounds\skillsounds\class02

and gave it a new name.
Because several skills shared that dbr and its sound entry.
I wanted to change the sound of just one of those skills. That would have been the solution.

But when I try to import that new dbr in the AssetManager, I get an

Error importing database record.

There´s no typo or such. I´m in the correct path. The copy is right next to the original…