log in as SU (root)
(some read out happens)
(you should see this)
E: Repository 'http://deb.opera.com/opera-beta stable InRelease' changed its 'Origin' value from 'Opera Software ASA' to 'Opera Software AS'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
Do you want to accept these changes and continue updating from this repository? [y/N] y
y (is your answer)