Cubase seems to have midi events that are linked between tracks?

I have no idea how I did it, but there are now midi events in my project that I can’t delete without deleting midi events on a different track. It’s almost like the tracks are linked or locked. Probably it’s a feature I’ve never encountered before. I tried to find a way to “split them apart” but I can’t figure it out.
.

Most likely you have got 2 or more MIDI Parts set as Shared Copies - which means a change to any Part will happen for all the Shared Copies