The service file lists an alias without a file extension.
The spec mandates that the extension of the listed alias matches the extension of the unit itself.
For more information please consult:
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 2ff4e94. For merge requests, please use the latest version in the Lintian check systemd.