Good day to all of you 
an undo button will be helpful in our daily work, and most software has this function.
Imo you are not the first in this forum asking for it, so pls. be so kind as to have a look here or search for “undo”:
https://community.enginedj.com/t/on-laptop-warning-when-syncing-playlists-etc-or-an-undo/40813
https://community.enginedj.com/t/undo-button/37924
https://community.enginedj.com/t/undo-last-beatgrid-edit-move-rather-than-reset-everything/30814
and so on, furthermore pls feel free, as to create a feature request. You can arrest most attention with a feature request.
Brgds from HAM
BeatMaster