What does the (!) mean in the output of poetry show

[KotlinIsland]

Poetry show puts a (!) before the version number of some packages and I can't figure out what it means.

poetry help show doesn't mention anything and I can't find anything in the docs about it.

> poetry show
safety                     (!) 1.10.3    Checks installed dependencies for known vulnerabilities.

[elliot-100]

Looking at the source, it means 'not installed', as a fallback to showing the package name in red:

poetry/src/poetry/console/commands/show.py

Lines 308 to 313 in 81c7d00

	if installed_status == "not-installed":
	color = "red"
	if not self.io.output.is_decorated():
	# Non installed in non decorated mode
	install_marker = " (!)"

See also #6330 and my related question: #7311