After updating my MacBook Pro (mid 2012) to macOS 10.15, Photos app will only suggest the more recently entered names as I type in a name in the "unamed" box. None of the older names (hundreds of them) which are still associated with older photos are suggested. I'm reluctant to start a duplicate name fearing it will hinder quick "people" search. What might be done to trouble shoot this problem? I have over 20,000 photos and serve as archivist for several groups.