We could potentially update the script on that page with the following
It should update the UUID and should work on all devices. Even if the UUID remains the same, it'll just update the existing ID.
May avoid these issues going forward
Adding
NEW_UUID=`blkid ${ROOT_DISK}p${ROOT_PART} | sed -n 's/.*PARTUUID="\([^"]*\)".*/\1/p'`
sed -i "s/PARTUUID=[^ ]*/PARTUUID=${NEW_UUID}/" /boot/cmdline.txt
after line 12 in 70-rootpt-resize