dpkg is unable to install a package for drivers for my Radeon HD 6450

[Seija K.]

Whenever I attempt to install a .deb package for radeon for ubuntu 18.04, instead of installing, I get an error that it is unable to install due to conflicts, even though I know the package is not even installed.

I get this:
dpkg: regarding .../xserver-xorg-video-radeon_18.0.1-1_amd64.deb containing xserver-xorg-video-radeon:
 xserver-xorg-video-radeon-hwe-18.04 conflicts with xserver-xorg-video-radeon
  xserver-xorg-video-radeon (version 1:18.0.1-1) is to be installed.

dpkg: error processing archive /home/seija/Downloads/xserver-xorg-video-radeon_18.0.1-1_amd64.deb (--install):
 conflicting packages - not installing xserver-xorg-video-radeon
Errors were encountered while processing:
 /home/seija/Downloads/xserver-xorg-video-radeon_18.0.1-1_amd64.deb

Description: Ubuntu 18.04.3 LTS
Release: 18.04

dpkg:
  Installed: 1.19.0.5ubuntu2.3
  Candidate: 1.19.0.5ubuntu2.3
  Version table:
 *** 1.19.0.5ubuntu2.3 500
        500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.19.0.5ubuntu2 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: dpkg 1.19.0.5ubuntu2.3
ProcVersionSignature: Ubuntu 5.0.0-37.40~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-37-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 6 14:45:42 2019
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: dpkg
UpgradeStatus: No upgrade log present (probably fresh install)