The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
The package contains a D-Bus session service whose filename
does not match the
Name field found in the file.
This makes it possible that two non-conflicting packages could
provide the same service name with the same search-path priority
(i.e. in the same directory). dbus-daemon will arbitrarily choose
one of them, which is unlikely to be the desired result.
Best-practice is that if you implement a session service whose well-known
com.example.MyService1, and it should be
service-activatable, you should achieve that by packaging