How to set Windows as default boot instead of Fedora 31

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.

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