Undoing MIDI Recording
You can undo previous MIDI record takes.
To undo a MIDI recording:

Once the Transport has been stopped, choose
Edit > Undo MIDI Recording.
The track is restored to its previous state. However, the following conditions apply:
• If you punched in and out several times before stopping the Transport, only the last punch is undone.
• When using Loop Record mode, all takes from each record pass are discarded.