Version 2021.03.18_138a1 is available upstream. Please consider updating!
It seems that version 2021.03.18_138a1 is available upstream, while the latest version in the Gentoo tree is 26.0_p1.
You think this warning is false? Read more about it here.

Available Versions

Versionamd64x86alphaarmarm64hppamipsppcppc64riscvsparc
26.0_p1  : 0 EAPI 8?amd64?x86?alpha arm arm64?hppa?mips?ppc?ppc64?riscv?sparc
21.0_p1  : 0 EAPI 8?amd64?x86?alpha arm arm64?hppa?mips?ppc?ppc64?riscv?sparc
15.0_p1  : 0 EAPI 8?amd64?x86?alpha ~arm arm64?hppa?mips?ppc?ppc64?riscv?sparc

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