Conflict in install VirtualBox-guest with yum

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Is this computer a VirtualBox virtual machine? VirtualBox-guest is for VM guests, VirtualBox allows you to run Virtual Machines, i.e. it's a host.

Use VirtualBox-guest on the virtual machine, but don't try to run VirtualBox on it.

repoquery -i VirtualBox-guest

please read description :

Important note: VirtualBox-guest can't be installed on Host (master) system because contains X11 and OpenGL drives that will mess up with your X11 configurations. This subpackage replace Oracle Linux Guest Addition but just for Fedora, therefore should be installed only when we have one Fedora as a guest system. Tools that use kernel modules for supporting integration with the Host, including file sharing, clipboard sharing, X.org X11 video and mouse driver, USB and webcam proxy and Seamless mode.