If you see duplicate packages when querying the RPM databases on a Linux system, it may be because you have multiple copies of the same package installed on the system.
To check for and remove duplicate packages, you can use the "rpm" command with the "-qa" option to list all the installed packages on the system, and the "--duplicates" option to display only the packages that are installed multiple times. For example:
rpm -qa --duplicates
This will display a list of packages that are installed multiple times on the system.
To remove the duplicate packages, you can use the "rpm" command with the "-e" option to uninstall the packages. For example, to uninstall the package "package.rpm", you can use the following command:
rpm -e package.rpm
This will uninstall the package from the system.
Note: Be careful when removing packages, as uninstalling certain packages may cause other packages to stop working or may remove important system components. Make sure you have a backup of any important data before removing any packages.