I need to undo the last edit on this. How do i do this? I need to keep Revision as of 15:39, June 3, 2021 and ignore all edits after this. -z

Not sure if you got this fixed as I see different time stamps and not the one you mention. Anyway, what I usually do is press "history" in the edit bar (just after the + sign) and then select the one I want as one of the two I want to compare. When I then "compare selected revisions" I get two columns at the top and in the one that in your case would read "Revision as of 15:37, 3 June 2021 (edit)" I just click the edit part and then I save it ignoring the warning that "You are editing an out-of-date revision of this page. If you save it, any changes made since this revision will be lost." --Tenzel Kim (talk) 05:26, 7 June 2021 (UTC)