kopia restore --overwrite-files --overwrite-directories --overwrite-symlinks <Snap_Id>
If contains a broken link and if the snapshot contains a valid file at the same place, the broken link is not overwritten with the valid file. Fortunately, an error message is displayed and the restore is completed (except for this file).
A workaround is to rename or delete the wrong file on the target and rerun the restore, but it is not convenient if you have plenty of files like that.