Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
When we try to upgrade from 8.1.9 to 8.2.7 the ./occ upgrade command shows:
Exception: Updates between multiple major versions are unsupported.
We tried the upgrade copy/paste owncloud folder and same error.
Operating system: Debian 7
Web server: apache
PHP version: php 5.4.36
ownCloud version (see ownCloud admin page): 8.1.9
Updated from an older ownCloud or fresh install:
ownCloud log (data/owncloud.log, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808):
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):
Integrity status for oC9+
Login as admin user into your ownCloud and access http://example.com/index.php/settings/integrity/failed paste the results here.