In addition to having the current Lightroom Classic photographers package, I also own LR6

In addition to having the current Lightroom Classic photographers package, I also own LR6 which I have instaled on an old Macbook Pro. I can't seem to log into it any more and when I try it sends me a code Adobe Account access and when I try to log in it tells me that I dont have the application in my list off Adobe sofetware is there some way to reinstall LR and put in my users code licence again without having to deal with Adobe Account Access