Copy & Paste - Artist → Album Artist

Hi all,

Is there a way to copy the contents from the Artist field and paste them into the Album Artist field? I have several files which have a blank entry under Album Artist, so I would like to do a batch copy and paste from the Artist field, so both fields have the same content. Can someone please help me out?

Select all the files that should be treated like that.
Try the function Convert>Tag-Tag
Enter for ...
Format-String: %artist%