Importing charts/playlists will not alter existing charts in your library.

If a chart you import has exactly the same title as a chart in your library but is somehow different, a number will be a will be added to the new chart’s title.

You have a “Lover” chart. The new chart will import as “Lover 1”.
If you already have 2 “Lover” charts the next one will import as “Lover” 2.

These added numbers are based on the order that charts are added to YOUR library.
Different devices/libraries may have charts numbered differently.

That’s why I prefer to add a “code” to my duplicate titles so I can easily see which band, singer, etc. they are for. I add the singer’s or band initials after the title
(ie. “Lover gs”)

New Users: it’s best to import main “get-started” playlists first. It’s a quick way to populate your library. That way duplicate titles added later will have numbers.
)BOB