TYPO3 Core

After upgrading and completed the Upgrade Wizard successfully everything worked, but after clicking on the Language module the following comes up and Im stuck....... (Not even deleting typo3temp/Cache solves my issue)

Fatal error: Uncaught exception 'TYPO3\Flow\Package\Exception\InvalidPackageStateException' with message 'Package "filemetadata" is already registered.' in /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Resources/PHP/TYPO3.Flow/Classes/TYPO3/Flow/Package/PackageManager.php:627 Stack trace: #0 /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Classes/Package/PackageManager.php(408): TYPO3\Flow\Package\PackageManager->registerPackage(Object(TYPO3\CMS\Core\Package\Package), false) #1 /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Classes/Package/PackageManager.php(386): TYPO3\CMS\Core\Package\PackageManager->registerPackage(Object(TYPO3\CMS\Core\Package\Package), false) #2 /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Classes/Package/PackageManager.php(241): TYPO3\CMS\Core\Package\PackageManager->registerPackagesFromConfiguration() #3 /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Classes/Package/PackageManager.php(118): TYPO3\CMS\Core\Package\PackageManager in /var/www/typo3_source/typo3_src-6.2.0beta5/typo3/sysext/core/Resources/PHP/TYPO3.Flow/Classes/TYPO3/Flow/Package/PackageManager.php on line 627