What I've done was to remove the last line in my init.el for ...
orgmode.org/elpa, restarted, then tried through list-packages to D org -- which seemed to comply, but never removed org-20210920 from the elpa directory. Not being gone, the old version kept reinstalling itself. So I finally manually moved org-20210920 somewhere else. But then repeated restarts never brought org-9.5 into the list-packages listing, despite having gnu/elpa in my init.el. But I did manage to "trick" 9.5 in by installing an org package with org, naturally, needed as a dependent. It offered some other version, but the "other version" install window knew about latest-greatest 9.5, which I chose, thereby "tricking" 9.5 to be installed. Org-9.5 is now listed only as a dependency in list-packages, of all things. I commented out my org-plus-contrib, not knowing how to proceed with it. The install instructions on the main org page were not very clear, to say the least.