New
#1101
To me, it looks like that partition had data but then the drive was later deleted - as if the OP wiped it.
As for overprovisioning; here's my "opinion"... SSD drives already come with a small amount of reserved space for garbage collection so I personally see no need to allocate any more. None of the 5 SSD drives in my system have any unallocated space as I see no reason for it. On the other hand I also I make sure none of the drives are over 70 percent filled - something I've been doing even back in the HDD days when drives were less than a TB.
In short, unless a specific reason, there's no need to waste storage space on something that's not going to be an issue unless you simply don't pay attention to your drive space.
My two cents.