It isn't important, the important part is the seed in the seeprom, which is at 0xb0-0xc0. It won't change every dump, but only every system format (will increase by one)there's a two-byte change with the seeprom with every dump, which I don't understand. I'm aware of the sequential change, but this doesn't really make sense to me. I don't know what the two bytes do, but those are the only changes.
I edited my comment with a second link that explains that better:
https://gbatemp.net/threads/seeprom2sd-by-dimok.450172/page-2#post-6870549