VPN connection keeps reappearing in KDE Plasma even when I delete it and other weird network behaviours

I’m experiencing this really weird behavior with a Wireguard VPN on the KDE-5.27.12 Kubuntu-24-04 . I imported the Wireguard config successfully using the networkmanager from KDE. The VPN connects automatically, but my surprise was: I cannot unchecked the connect-automatic option in the KDE settings panel. So I decided to delete the VPN I get one error, but apparently works…after rebooted the VPN connection is back and automatically connects when the network connects.

I managed to disable the auto-connect with: nmcli con mod “my-vpn” connection.autoconnect no

After reboot stay in no-auto-connection that was a success.

But deleting no, after reboot all VPN connection are back. I try to do as root, same issue.

Any help will be appreciate.

Solved: delete manually from:/etc/netplan/