I just want to install two packages in my Fedora 15 but I am getting some weird error.Command:yum install @development-toolsError:Loaded plugins: langpacks, presto, refresh-packagekit Setting up  Install Process Package flex-2.5.35-13.fc15.x86_64 already installed  and latest version Error: Package tuple ('gcc', 'x86_64', '0',  '4.6.0', '6.fc15') could not be found in rpmdbCommand:yum install fedora-packagerError:Loaded plugins: langpacks, presto, refresh-packagekit Setting up  Install Process Error: Package tuple ('fedora-packager', 'noarch',  '0', '0.5.9.0', '1.fc15') could not be found in rpmdbOn first command  it says package already installed and latest version but why I got that error line.How to fix this errors?
Meaning of the yum error Package tuple (...) could not be found in rpmdb
fedora;yum;rpm
Sounds like corrupt data. Do: yum clean all followed by yum update and then try the installation again.