Version 17 is available upstream. Please consider updating!
It seems that version 17 is available upstream, while the latest version in the Gentoo tree is 16. You think this warning is false? Read more about it here.
This is efibootmgr, a Linux user-space application to modify the Intel
Extensible Firmware Interface (EFI) Boot Manager. This application
can create and destroy boot entries, change the boot order, change
the next running boot option, and more.