Config file version control in VSCode

Hello everyone, recently I have seen a warning message in VSCode (Add-in) when making changes to my config file. It alerts me that there is a discrepancy between the file I am trying to edit/save (configuration.yaml) and apparently another (more recent ?) version of the file. See picture attached.

I am pretty sure that configuration.yaml I am editing is the latest. Can someone explain what the other file is and how I can purge it (or at least sync it) so the warning goes away in the future ?

Thanks !