The changes file only has changelog entries from a single version. It is recommended for backports to include all changes since (old)stable or the previous backport. This can be done by adding the '-v' option to the build with the appropriate version.
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 ffc17eb. For merge requests, please use the latest version in the Lintian check fields/distribution.