d-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

The directory @WHERE@ is specified as the mount point (second field in
/etc/fstab or Where= field in systemd unit file) and is not empty.
This does not interfere with mounting, but the pre-exisiting files in
this directory become inaccessible. To see those over-mounted files,
please manually mount the underlying file system to a secondary
location.