The tag is present in Lintian version 2.113.26. 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 43a81d7. For merge requests, please use the latest version in the Lintian check nmu.
The first line of the changelog entry for this package appears to indicate it is a non-maintainer upload (by including either that string or the string "NMU" and not saying that it's an acknowledgement), but the changelog indicates the person making this release is one of the maintainers.
If this was intended to be an NMU, do not add yourself as a maintainer or uploader. Otherwise, please rephrase your changelog entry to not cause confusion.