Before update - delete nextcloud.log file and set config_is_read_only = false in config/config.php

sudo -u nextcloud /usr/bin/php /var/www/nextcloud.cebin.info/web/updater/updater.phar 

sudo -u nextcloud /usr/bin/php /var/www/nextcloud.cebin.info/web/occ db:add-missing-primary-keys