With the current supported versions of Endevor (17.0 / 18.0.12) you have the ability to edit a previous level in Quickedit.
bring up Quickedit as you normally would
From the Quickedit initial panel fill in the following fields: environment / system / subsystem / type leaving the element name blank to get a list or fill in the name of of the element you would like to edit.
When you get the element display put a S beside the element name A list of all version levels for the element will display. Put an E beside the version / level you want to edit Make the changes to the element When you are done with the editing, hit the pf3 key you will now see your job card and you can now submit the changes