I need Windows for some work and it can’t be done using LibreOffice on Linux (cross-compatibility issues) and it is explicitly mentioned that I need to use MS Office, so I was wondering which version of it I should pirate.

So, should I pirate MS Office 16 or 21? And I have the latest version of Office, but I don’t have the product key to activate it, should I uninstall it before installing the pirated software?