Annoying Popup When Duplicating Audio Parts

I tried to move a recorded audio part towards unallocated space underneath the created parts - usually cubase creates a new part with it and all the settings I made. Now with Cubase 10, this happens:

I get a popup asking me to add Sidechain channels. The worst part is, I cannot do anything except search for a name. Doubleclicking or hitting space or enter won’t do anything.

Has anyone experienced that before?

FIgured it out! If you hit Alt-F4 or Command-W on a mac, the window will close. Very peculiar thing! It must be a bug since I cannot do anything except close this weird popup!