Hey, summarizing the solution for any future readers: (feel free to mark as a solution)
- Change MIDI Record Mode to “Replace”
- In preference > Record > MIDI > “Replace Recording in Editors” select “Controller”.
- Open the key editor of the event you want to record over.
- Turn on “Record in Editor” (top left)

- Record in the Key Editor using a key command (i.e.
NumPad *) or MIDI control (not via the on screen transport).
cc Controls will be overridden.
Sadly there is no way to do it with more than one part at the time. Which I agree is a big miss and could come very handy!
Today you can open many parts in the key editor but you can’t record in the key editor for all of them.
As a workaround for this, maybe you can create a logical editor action that deletes your cc events, so you can quickly do it for all of your events, and then use “merge” to record over them.