wsl: Unknown key 'wsl2.defaultVhdSize'

[taylorsilva]

Starting two weeks ago (first week of October) I started getting this error every time I start up WSL (Ubuntu 22.04):

wsl: Unknown key 'wsl2.defaultVhdSize' in C:\Users\tsilva\.wslconfig:5

My .wslconfig looks like this:

[wsl2]
# Limit disk size to 256B
defaultVhdSize=256GB

From what I can tell this is still a valid value based on the docs here: https://learn.microsoft.com/en-us/windows/wsl/wsl-config

Just to confirm that my WSL didn't somehow flip to WSL 1 (which I never even used on this computer):

PS C:\Users\tsilva> wsl --list --verbose
  NAME            STATE           VERSION
* Ubuntu-22.04    Running         2

To be clear, my WSL is working fine otherwise. This message pops up at the start but everything works fine. I'm just curious why I'd be getting this error and am wondering if anyone else started getting this error too.