How do I turn off the circle member petitioned imperial diet popup?

[The Puritan Pietist]

I tried finding it in the message settings and can't find it. It's the one that says "Petition received from Circle Leader, HRE COUNTRY has petitioned the Imperial Diet."

[Salsifis]

There's a 3 bars icon on the top right of the pop, you click on that to open the menu to manage and disable it