Leapp Upgrade from Oracle Linux 7 to 8 Fails with "conflicts with file from package"

APPLIES TO

Oracle Cloud Infrastructure - Version N/A and later

Linux x86-64

SYMPTOMS

Using Leapp, upgrade from Oracle Linux 7.9 to Oracle Linux 8 fail after reboot.

The log /var/log/leapp/leapp-upgrade.log shows:

Oct 12 12:03:46 localhost upgrade[501]: STDERR: 
Oct 12 12:03:46 localhost upgrade[501]: Warning: Packages marked by Leapp for install not found in repositories metadata: python3-nss ldns-utils rpcgen python3-pyxattr gdk-pixbuf2-xlib ivy-local python3-javapackages libnsl2-devel rpcsvc-proto-devel 
Oct 12 12:03:46 localhost upgrade[501]: Warning: Packages marked by Leapp for upgrade not found in repositories metadata: leapp-upgrade-el7toel8 leapp python2-leapp 
Oct 12 12:03:46 localhost upgrade[501]: Transaction couldn't start: 
Oct 12 12:03:46 localhost upgrade[501]: file /usr/lib/node_modules/npm/docs from install of npm-1:6.14.11-1.10.24.0.1.module+el8.3.0+9671+154373c8.x86_64 conflicts with file from package nodejs-2:12.22.12-1nodesource.x86_64 
Oct 12 12:03:46 localhost upgrade[501]: Error: Could not run transaction.