What is grauda linux (on /dev/sda1) in grub created after restoring a snapshot from snapper

[filo]

@NaN

os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Garuda Linux on /dev/sda1

This reminds me of this

Multiple Garuda boot entries in Grub after update

Meanwhile I found this: Gentoo Forums :: View topic - os-prober creating duplicate entry for main linux system TL;DR a partition can be blacklisted from os-prober so it doesn't show up twice perhaps on EFI there's no need for a GRUB entry, but I don't have EFI and don't know jack about it. edit: posting this just in case someone is still on BIOS booting, my previous comments were due to my misunderstanding that this case is about an EFI boot.

I think you should try that linked suggestion to skip your partition from os-prober.