The tag is present in Lintian version 2.108.13. That is the most recent version we know about.
The listed trigger is present in the control file of the package.
The trigger is an
await trigger, which may not be obvious from its name.
await triggers place rather strong requirements on
dpkg that often lead
to trigger cycles due to changes in other packages.
If the package does not need the guarantees that
dpkg provides to
triggers, please use the
-noawait variant of the trigger. This is often
the case for packages that use the trigger to compile a form of cache.
If the package does need the guarantees provided by
dpkg, then please
document the rationale in a comment above the trigger and use the
-await variant of the trigger to avoid this warning.