Cannot apt-get update - gnutls_handshake failed

Hey they,

I moved forward and upgraded my existing omv3 to omv4. Worked without any issues, except I had to remove and reinstall watchdog.

But after installing omv-extras I cannot run apt-get update anymore. Or at least it won't let me:

gnutls_handshake() failed: Public key signature verification has failed.

For both repos.

Any ideas?

openmediavault-keyring is installed.

Output of apt-get update:
https://paste.ubuntu.com/p/ygf5rNnxK8/

Output of apt-get list
https://paste.ubuntu.com/p/j8VjZbCjQn/

I has something to do with the ssl handshake. I get omv-extras running by forcing http://.

I've noticed that the openssl package was missing for some reasons, but reinstalling changed anyting.

dpkg -l | grep libgnutls
ii  libgnutls-deb0-28:amd64                                          3.3.8-6+deb8u7                    amd64        GNU TLS library - main runtime library
ii  libgnutls-openssl27:amd64                                        3.5.8-5+deb9u3                    amd64        GNU TLS library - OpenSSL wrapper
ii  libgnutls30:amd64                                                3.5.8-5+deb9u3                    amd64        GNU TLS library - main runtime library

I got it working by downgrading libcurl3-gnutls to the latest one of jessie
(libcurl3-gnutls=7.38.0-4+deb8u4)

But why it's not working with the latest one?

Solved by myself.

It was caused by the exisiting libgnutls-deb0-28 from the jessie repo. I guess it wasn't removed during the omv-release-upgrade process. On other installation it doesn't harm anything, but in my case I had troubles. Removing it also removes openmediavault, but it was easy to reinstall everything in a few steps.