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The following error is reported during the update from 13.0.5 to 13.0.6
Using the same update procedure with previous releases, that normally works fine.
# occ upgrade
Nextcloud or one of the apps require upgrade - only a limited number of commands are available
You may use your browser or the occ upgrade command to do the upgrade
Set log level to debug
Doctrine\DBAL\Exception\UniqueConstraintViolationException: An exception occurred while executing 'INSERT INTO oc_filecache (fileid, storage, parent, name, mimetype, mimepart, mtime, encrypted, path, path_hash, etag, storage_mtime, permissions, size, unencrypted_size, checksum) SELECT fileid, storage, parent, name, mimetype, mimepart, mtime, encrypted, path, path_hash, etag, storage_mtime, permissions, size, unencrypted_size, checksum FROM __temp__oc_filecache':
SQLSTATE[23000]: Integrity constraint violation: 19 UNIQUE constraint failed: oc_filecache.fileid
Update failed
Maintenance mode is kept active
Reset log level
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 12.0.2): 13.0.5 -> 13.0.6
Operating system and version (eg, Ubuntu 17.04): openSUSE_42.2
Apache or nginx version (eg, Apache 2.4.25): apache2 2.4.23
PHP version (eg, 7.1): 7.0.7
The issue you are facing:
Upgrade fails
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- install nextcloud 13.0.6
- occ upgrade
The update procedure is the same as all preceding updates. Those were succesfull.
The output of your Nextcloud log in Admin > Logging:
{"reqId":"84o4cpC4DpTk9erpjvc8","level":0,"time":"2018-09-08T15:32:35+02:00","remoteAddr":"","user":"--","app":"core","method":"--","url":"--","message":"starting upgrade from 13.0.5.2 to 13.0.6.1","userAgent":"--","version":"13.0.5.2"}
{"reqId":"84o4cpC4DpTk9erpjvc8","level":3,"time":"2018-09-08T15:32:39+02:00","remoteAddr":"","user":"--","app":"core","method":"--","url":"--","message":"Exception: {\"Exception\":\"Doctrine\\\\DBAL\\\\Exception\\\\UniqueConstraintViolationException\",\"Message\":\"An exception occurred while executing 'INSERT INTO oc_filecache (fileid, storage, parent, name, mimetype, mimepart, mtime, encrypted, path, path_hash, etag, storage_mtime, permissions, size, unencrypted_size, checksum) SELECT fileid, storage, parent, name, mimetype, mimepart, mtime, encrypted, path, path_hash, etag, storage_mtime, permissions, size, unencrypted_size, checksum FROM __temp__oc_filecache':\\n\\nSQLSTATE[23000]: Integrity constraint violation: 19 UNIQUE constraint failed: oc_filecache.fileid\",\"Code\":0,\"Trace\":\"#0 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/doctrine\\\/dbal\\\/lib\\\/Doctrine\\\/DBAL\\\/DBALException.php(128): Doctrine\\\\DBAL\\\\Driver\\\\AbstractSQLiteDriver->convertException('An exception oc...', Object(Doctrine\\\\DBAL\\\\Driver\\\\PDOException))\\n#1 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/doctrine\\\/dbal\\\/lib\\\/Doctrine\\\/DBAL\\\/Connection.php(964): Doctrine\\\\DBAL\\\\DBALException::driverExceptionDuringQuery(Object(Doctrine\\\\DBAL\\\\Driver\\\\PDOSqlite\\\\Driver), Object(Doctrine\\\\DBAL\\\\Driver\\\\PDOException), 'INSERT INTO oc_...')\\n#2 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/lib\\\/private\\\/Repair\\\/SqliteAutoincrement.php(96): Doctrine\\\\DBAL\\\\Connection->query('INSERT INTO oc_...')\\n#3 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/lib\\\/private\\\/Repair.php(93): OC\\\\Repair\\\\SqliteAutoincrement->run(Object(OC\\\\Repair))\\n#4 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/lib\\\/private\\\/Updater.php(258): OC\\\\Repair->run()\\n#5 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/lib\\\/private\\\/Updater.php(139): OC\\\\Updater->doUpgrade('13.0.6.1', '13.0.5.2')\\n#6 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/core\\\/Command\\\/Upgrade.php(270): OC\\\\Updater->upgrade()\\n#7 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/symfony\\\/console\\\/Command\\\/Command.php(264): OC\\\\Core\\\\Command\\\\Upgrade->execute(Object(Symfony\\\\Component\\\\Console\\\\Input\\\\ArgvInput), Object(Symfony\\\\Component\\\\Console\\\\Output\\\\ConsoleOutput))\\n#8 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/symfony\\\/console\\\/Application.php(874): Symfony\\\\Component\\\\Console\\\\Command\\\\Command->run(Object(Symfony\\\\Component\\\\Console\\\\Input\\\\ArgvInput), Object(Symfony\\\\Component\\\\Console\\\\Output\\\\ConsoleOutput))\\n#9 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/symfony\\\/console\\\/Application.php(228): Symfony\\\\Component\\\\Console\\\\Application->doRunCommand(Object(OC\\\\Core\\\\Command\\\\Upgrade), Object(Symfony\\\\Component\\\\Console\\\\Input\\\\ArgvInput), Object(Symfony\\\\Component\\\\Console\\\\Output\\\\ConsoleOutput))\\n#10 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/symfony\\\/console\\\/Application.php(130): Symfony\\\\Component\\\\Console\\\\Application->doRun(Object(Symfony\\\\Component\\\\Console\\\\Input\\\\ArgvInput), Object(Symfony\\\\Component\\\\Console\\\\Output\\\\ConsoleOutput))\\n#11 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/lib\\\/private\\\/Console\\\/Application.php(173): Symfony\\\\Component\\\\Console\\\\Application->run(Object(Symfony\\\\Component\\\\Console\\\\Input\\\\ArgvInput), Object(Symfony\\\\Component\\\\Console\\\\Output\\\\ConsoleOutput))\\n#12 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/console.php(90): OC\\\\Console\\\\Application->run()\\n#13 \\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/occ(11): require_once('\\\/srv\\\/www\\\/vhosts...')\\n#14 {main}\",\"File\":\"\\\/srv\\\/www\\\/vhosts\\\/owncloud.server-fqdn\\\/nextcloud-13.0.6\\\/3rdparty\\\/doctrine\\\/dbal\\\/lib\\\/Doctrine\\\/DBAL\\\/Driver\\\/AbstractSQLiteDriver.php\",\"Line\":48}","userAgent":"--","version":"13.0.5.2"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'datadirectory' => '/srv/owncloud',
'dbtype' => 'sqlite3',
'defaultapp' => 'bookmarks',
'version' => '13.0.5.2',
'installed' => true,
'logfile' => '/var/log/nextcloud/nextcloud.log',
'log_rotate_size' => 1048576,
'loglevel' => 0,
'theme' => '',
'trusted_domains' =>
array (
),
'maintenance' => false,
'memcache.local' => '\\OC\\Memcache\\APCu',
'forcessl' => true,
'forceSSLforSubdomains' => true,
'htaccess.RewriteBase' => '/',
'trashbin_retention_obligation' => 'auto, 30',
);
The output of your Apache/nginx/system log in /var/log/____:
webserve is down during the upgrade
