Upgrading Ccache -> cache invalid?

"Sebert, Holger.ext via ccache" <[email protected]> Mon, 11 Oct 2021 13:13:37 +0000
Newsgroups gmane.comp.compilers.ccache
Message-ID <DB6PR01MB37365DA6C6B75F0AF5492892A4B59@DB6PR01MB3736.eurprd01.prod.exchangelabs.com>
Hi,

I would like to upgrade Ccache from version 3.4.1 to 4.2 (or newer).

Are the caches from the old version still valid or should I clean them up before upgrading?

Best,
Holger