The source tarball contains a prebuilt Parse::Yapp parser. This is usually left by mistake when generating the tarball without first cleaning the source directory. You may want to report this as an upstream bug if there is no sign that this was intended.
Please build the parser from source.
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 8ab6976. For merge requests, please use the latest version in the Lintian check languages/perl/yapp.