I have 20 identical machines in my classroom lab, and have options that require me to update the grub.cfg file on all machines via a script. That process works fine, but just know 1 of the 20 machines is showing a warning in the process, while the other 19 run with no warning. The grub2 report the same version, and all machine are fully updated??

grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub.cfg ...
Found background: /boot/verne.png
Found linux image: /boot/vmlinuz-3.14.8-200.fc20.x86_64
Found initrd image: /boot/initramfs-3.14.8-200.fc20.x86_64.img
Warning: Please don't use old title ‘Fedora, with Linux 3.14.8-200.fc20.x86_64’ for GRUB_DEFAULT, use ‘Advanced options for Fedora>Fedora, with Linux 3.14.8-200.fc20.x86_64’ (for versions before 2.00) or ‘gnulinux-advanced-da77086f-03af-4125-9acd-f8a4215b5dd6>gnulinux-3.14.8-200.fc20.x86_64-advanced-da77086f-03af-4125-9acd-f8a4215b5dd6’ (for 2.00 or later)
Found linux image: /boot/vmlinuz-3.14.7-200.fc20.x86_64
Found initrd image: /boot/initramfs-3.14.7-200.fc20.x86_64.img
Found linux image: /boot/vmlinuz-3.14.5-200.fc20.x86_64
Found initrd image: /boot/initramfs-3.14.5-200.fc20.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-c55c7a49359e497fadc04cf0a1871063
Found initrd image: /boot/initramfs-0-rescue-c55c7a49359e497fadc04cf0a1871063.img
Found memtest image: /boot/elf-memtest86+-5.01
Found Windows 7 (loader) on /dev/sda2
done

So, don't know why 19 machines would work correctly, but one gives the above warning?

Even ran yum reinstall grub2*, but results are the same afterwards as well.

Thanks.