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 a1e47cb. For merge requests, please use the latest version in the Lintian check menu-format.
The menu item has a line that has a tag in it that is not one of the standard tags (needs=, section=, title=, longtitle=, command=, etc). While other tags can be used for specialized purposes, this is rare and it's more likely the tag's name is misspelled.