While updating my Debian 10 Buster server, I experienced an invalid signature from deb.sury.org root@www112:~# apt updateHit:1 http://deb.debian.org/debian buster InReleaseHit:2 http://deb.debian.org/debian buster-updates InReleaseHit:3 http://security.debian.org buster/updates InReleaseHit:4 http://apt.bitninja.io/debian bitninja InReleaseGet:5 https://packages.sury.org/php buster InRelease [7,559 B]Get:6 https://packages.microsoft.com/ubuntu/18.04/mssql-server-2019 bionic InRel ease [3,630 B]Get:7 https://packages.microsoft.com/ubuntu/18.04/prod bionic InRelease [3,638 B ]Err:5 https://packages.sury.org/php buster InReleaseThe following signatures were invalid: EXPKEYSIG B188E2B695BD4743 […]