same version

Hello ! as the title said, i would like to confirm if i flash my bios with the same bios version. it that will effect anything? or it just clear up the data and install again.

Hello. I just bought a Asus Z97 K motherboard a second hand one and i have noticed that the BIOS version is the same version like the version on the Asus site but the version of Asus site has a more recent date like a year difference. Is the same version or is diferent version? Worth updating? I...