1 erstellte News löschen ... wird 2x abgezogen

Fatal error: A package can't overwrite files from other packages. Only an update from the package which owns the file can do that. (Package 'de.wbb-elite.news.wbb.post' tries to overwrite file 'lib/system/event/listener/NewsPostBoardListener.class.php', which is owned by package 'de.wbb-elite.news')
Information:

id: 4a085f1a8bbc9ab5de68b0fa8780adb4a56f739c
error message: A package can't overwrite files from other packages. Only an update from the package which owns the file can do that. (Package 'de.wbb-elite.news.wbb.post' tries to overwrite file 'lib/system/event/listener/NewsPostBoardListener.class.php', which is owned by package 'de.wbb-elite.news')
error code: 0
file: /www/htdocs/w0107091/kultarchiv/wcf/lib/system/package/FilesFileHandler.class.php (48)
php version: 5.4.45-nmm1
wcf version: 2.1.9 pl 1 (Typhoon)
date: Mon, 28 Dec 2015 14:27:58 +0000
request: /acp/index.php?install-package/&&
referer: http://www.kult-archiv.de/acp/index.php?package-installation-confirm/&queueID=49&
Stacktrace:

#0 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/setup/Installer.class.php(184): wcf\system\package\FilesFileHandler->checkFiles(Array)
#1 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/setup/Installer.class.php(145): wcf\system\setup\Installer->checkFiles(Array)
#2 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/setup/Installer.class.php(56): wcf\system\setup\Installer->install()
#3 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/package/PackageInstallationDispatcher.class.php(658): wcf\system\setup\Installer->__construct('/www/htdocs/w01...', '/www/htdocs/w01...', Object(wcf\system\package\FilesFileHandler))
#4 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/package/plugin/FilePackageInstallationPlugin.class.php(51): wcf\system\package\PackageInstallationDispatcher->extractFiles('/www/htdocs/w01...', '/www/htdocs/w01...', Object(wcf\system\package\FilesFileHandler))
#5 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/package/PackageInstallationDispatcher.class.php(571): wcf\system\package\plugin\FilePackageInstallationPlugin->install()
#6 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/package/PackageInstallationDispatcher.class.php(139): wcf\system\package\PackageInstallationDispatcher->executePIP(Array)
#7 /www/htdocs/w0107091/kultarchiv/wcf/lib/acp/action/InstallPackageAction.class.php(73): wcf\system\package\PackageInstallationDispatcher->install('69f34f9c')
#8 /www/htdocs/w0107091/kultarchiv/wcf/lib/action/AbstractDialogAction.class.php(70): wcf\acp\action\InstallPackageAction->stepInstall()
#9 /www/htdocs/w0107091/kultarchiv/wcf/lib/action/AbstractAction.class.php(49): wcf\action\AbstractDialogAction->execute()
#10 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/request/Request.class.php(58): wcf\action\AbstractAction->__run()
#11 /www/htdocs/w0107091/kultarchiv/wcf/lib/system/request/RequestHandler.class.php(139): wcf\system\request\Request->execute()
#12 /www/htdocs/w0107091/kultarchiv/acp/index.php(10): wcf\system\request\RequestHandler->handle('wbb', true)
#13 {main}