I don't see any way to undo that in the event I want to make changes.
If you add a Nested Sequence to your "main production",
you can still enter and revise the Nested Sequence and the
changes will automatically update in your "main production".
Joe, Is here a way to add the sequence to the main production without changing first using the Nest option on the right click menu? When I have done that, I was unable to see how to Unnest the sequence.
Control > Double Click your Sequence in the Project panel
to load it into the Source Monitor, then insert or overwrite
into the "main production'.
This will leave the original 'un-nested' Sequence in the Project Panel.
If you alter the 'un-nested' Sequence, the changes will update
in the Nested instance in your "main production'.
Thank you Joe and Ann