The package installs the listed file to a directory in / (the filesystem root) rather than to the corresponding directory inside /usr.
Debian requires systems to mount /usr prior to invoking init (using an initramfs if necessary) so any executables, libraries, or other files placed in / for use by early portions of the system init no longer need to do so.
Moving a file from / to /usr (especially an executable in /bin or /sbin) will often require a compatibility symlink to the new location, as other software may invoke it by absolute path.
A compatibility symlink to the corresponding file in /usr will not trigger this warning but a symlink to anywhere else will.
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit fd97859. For merge requests, please use the latest version in the Lintian check files/usr-merge.
This is a classification. There is no issue with your package.