Unity is like my wife, never ending complaints!

Hi,
Look at this

whenever I import something new or like that Unity starts complaining about something and makes me worried then when you click the clear button they gone and nothing bad happens.
So why do you make me nervous?
Why don’t you keep yourself silent?

It looks like the asset you imported includes its own copy of the PP stack. Don’t import that if you already have the PP stack in your project. Or remove your existing PP stack. Of course make backups before making these kinds of changes.