Removing/reseting Midi automation "curves" from patterns

[stmusicmusic]

How could I remove/erase (or reset) Midi automation curves of certain instrument from certain pattern ?

Now I got several Percussion instruments in Pattern 20 and some painted Midi automation curves on. However I copied Cymbal rolls notes from Pattern 20 to Pattern 15 and painted new automation curves in Pattern 15. Problem occurs when I put those two Patterns side by side in Playlist - when playing the song, those automations work at the same time and cymbals doesn't sound natural.
My goal is to organize instruments better in Playlist and that's why I am asking.

So I appreciate a lot if somebody would know how to erase/reset those midi automations in patterns.

[Perfect Human]

At the top of the window there is a little circ...