The first package has a relation on the second package using a dpkg-control substitution variable to generate the versioned part of the relation. However the second package is not built from this source package. Usually this means there is a mistake or typo in the package name in this dependency.
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 43a81d7. For merge requests, please use the latest version in the Lintian check debian/version-substvars.