First option doesn’t check the correctness:
cat /boot/grub2/grubenv
saved_entry=Windows 7 (on /dev/sda2)
But i’ve no Win’ at all.
Second option… doesn’t check the correctness too:
cat /boot/grub2/grubenv
saved_entry=99
But I’ve no so many entries.
Of course i’ve a copy of my original /boot/grub2/grubenv.