apt update
Ign:1 Index of /debian stretch InRelease
Hit:2 Index of /debian stretch-updates InRelease
Get:3 Index of /debian-security stretch/updates InRelease [53.0 kB]
Hit:4 Index of /PMM_0.1.11 stretch InRelease
Hit:5 Index of /debian stretch Release
Hit:6 Index of /pool/PSA_18.0.39_7558 stretch InRelease
Hit:7 Index of /PHP73_17 stretch InRelease
Hit:8 Index of /PHP74_17 stretch InRelease
Ign:9 Index of /grafana/deb stable InRelease
Err:10 Index of /grafana/deb stable Release
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Reading package lists... Done
E: The repository 'Index of /grafana/deb stable Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.