canonical-livepatch errors

after installing ubuntu, i tried to enable livepatch but first i faced this error:

    error executing enable: cannot enable machine: bad temporary server status 500 (URL: https://livepatch.canonical.com/api/machine-tokens) server response: machine token already exists        

so i did sudo rm /etc/machine-id /var/lib/dbus/machine-id && sudo systemd-machine-id-setup and then sudo rm /etc/machine-id /var/lib/dbus/machine-id && sudo systemd-machine-id-setup but it brings me new error after i tried to enable livepatch again:

error executing enable: failed to read machine-id