how can i delete duplikates in 1password8 ?

Thanks, andrew_l_1P. In case it might inform those conversations, I'll tell you what happened next:
When I told her now to change the setting, she more-or-less refused. It was too much for her, atop having recently switched from LastPass. (A switch for which she's grateful, mind.) Now, this is an educated and intelligent person! But one who "hates computers". There are many of those, and they often resist going into the Settings or Preferences.

By contrast, nerds like me love to explore all the menus. But that's not normal.