Community Blog lässt sich nicht installieren.

Fatal error: Illegal statement 'DROP TABLE IF EXISTS wcf1_trackback_adapter'. An installation can't drop logged tables.
You will get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=13020
Information:
error message: Illegal statement 'DROP TABLE IF EXISTS wcf1_trackback_adapter'. An installation can't drop logged tables.
php version: 5.3.3-7+squeeze3
wcf version: 1.1.8 (Tempest)
file: /var/www/forum/wcf/lib/acp/package/plugin/SqlPackageInstallationPlugin.class.php (318)
error code: 13020
date: 02/03/2012 07:41pm
request: /forum/acp/index.php?page=Package&step=SqlPackageInstallationPlugin&queueID=1064&action=install&packageID=48&
referer: http://www.eifok-team.de/forum/acp/index.php?page=Package&step=FilesPackageInstallationPlugin&queueID=1064&action=install&packageID=48&
Stacktrace:
#0 /var/www/forum/wcf/lib/acp/package/plugin/SqlPackageInstallationPlugin.class.php(227): SqlPackageInstallationPlugin->checkDropTables('468', 'install')
#1 /var/www/forum/wcf/lib/acp/package/plugin/SqlPackageInstallationPlugin.class.php(85): SqlPackageInstallationPlugin->checkSQL('468', 'install')
#2 /var/www/forum/wcf/lib/acp/package/PackageInstallationQueue.class.php(146): SqlPackageInstallationPlugin->install()
#3 /var/www/forum/wcf/lib/acp/package/PackageInstallation.class.php(328): PackageInstallationQueue->executePackageInstallationPlugin('SqlPackageInsta...')
#4 /var/www/forum/wcf/lib/acp/package/PackageInstallation.class.php(52): PackageInstallation->install()
#5 /var/www/forum/wcf/lib/acp/page/PackagePage.class.php(49): PackageInstallation->__construct(1064)
#6 /var/www/forum/wcf/lib/page/AbstractPage.class.php(46): PackagePage->show()
#7 /var/www/forum/wcf/lib/util/RequestHandler.class.php(64): AbstractPage->__construct()
#8 /var/www/forum/wcf/lib/util/RequestHandler.class.php(92): RequestHandler->__construct('Package', Array, 'page')
#9 /var/www/forum/acp/index.php(8): RequestHandler::handle(Array)
#10 {main}
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