Vscode compile always gives error about obsolete PIO core

I use VScode on windows and on every compile of my Arduino sketch I get:

Obsolete PIO Core v5.2.5 is used (previous was 5.3.0a3)
Please remove multiple PIO Cores from a system:

The recommended setting in the link is already set to true.

VSCode - Settings > Set platformio-ide.useBuiltinPIOCore to true

How can I find which PlatformIO version I have installed on windows?
I have only installed PlatformIO using VScode.