Upgrade from RHEL 6.9 to RHLE 7.4 failing

Issue

• Upgrade from RHEL 6.9 to RHEL 7.4 failing.

[   11.777514] upgrade[1511]: Warning: failed to open file /sysroot/var/lib/system-upgrade/media/Packages/libacl-2.2.51-12.el7.x86_64.rpm
[   11.777729] upgrade[1511]: Warning: couldn't add media/Packages/libacl-2.2.51-12.el7.x86_64.rpm to the transaction
[   11.777969] upgrade[1511]: Warning: failed to open file /sysroot/var/lib/system-upgrade/media/Packages/zlib-1.2.7-17.el7.x86_64.rpm
[   11.778216] upgrade[1511]: Warning: couldn't add media/Packages/zlib-1.2.7-17.el7.x86_64.rpm to the transaction
[   11.778460] upgrade[1511]: Warning: failed to open file /sysroot/var/lib/system-upgrade/media/Packages/info-5.1-4.el7.x86_64.rpm
[   11.778684] upgrade[1511]: Warning: couldn't add media/Packages/info-5.1-4.el7.x86_64.rpm to the transaction
[   11.778921] upgrade[1511]: Warning: failed to open file /sysroot/var/lib/system-upgrade/media/Packages/grep-2.20-3.el7.x86_64.rpm
[   11.779233] upgrade[1511]: Warning: couldn't add media/Packages/grep-2.20-3.el7.x86_64.rpm to the transaction
[   11.779491] upgrade[1511]: Warning: failed to open file /sysroot/var/lib/system-upgrade/media/Packages/vim-minimal-7.4.160-2.el7.x86_64.rpm
[   11.779726] upgrade[1511]: Warning: couldn't add media/Packages/vim-minimal-7.4.160-2.el7.x86_64.rpm to the transaction
[   11.779959] upgrade[1511]: 0 packages to install, 0 to erase
[   11.780381] upgrade[1511]: Warning: nothing to upgrade
[   11.780635] upgrade[1511]: mv: cannot stat `/system-upgrade/*.pem': No such file or directory
[FAILED] Failed to start System Upgrade.
See 'systemctl status upgrade.service' for details.