The V is the number. On a base game with no updates pre-applied, this is also 0100 . The presence of V0100 reinforces that this is a base PKG, not an updated 'repack'.
Each segment of the string contains a foundational piece of information used by the PlayStation 4's internal Orbis operating system: FIFA 17 -A0100-V0100- -CUSA03214- PS4 PKG -AUCT...
It tells us:
If you are looking to manage your software library, please let me know: The V is the number
This is the most technically significant part of the filename, as it contains vital information about the base game and its update status. FIFA 17 -A0100-V0100- -CUSA03214- PS4 PKG -AUCT...