The tag is present in Lintian version 2.114.30. 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 1bc5241. For merge requests, please use the latest version in the Lintian check fields/distribution.
The version number looks like a backport, but the upload's target distribution is not a backport suite.