How to delete duplicated playlists on iphone?

There over 1,000 it's going to take me forever to delete them one by one, any ideas? I delete iTunes on my laptop because so I'll have to try and delete them on my iPhone but I want a quicker way!

Reinstall iTunes.

Download iTunes again and sync your phone, it will erase all data and then manually select the playlist you want to keep by clicking the check box next to it.

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