Duplicate songs in playlist (yes another one...)

[AkariusOne]

Hi!
I love musicbee, it's been my prefered music player for a while.
Lastly, when I drag a song to a playlist, musicbee no longer ask me if I want to add it anyway since the song is already there.  I don't know why and I can't seem to find how to put it back.  Someone must have click on add it anyway and check that box to "don't ask me again".

So I now have to remove duplicates each time I change my playlist...it's quite annoying.

Somebody know how to reset this feature?

Thanks a lot!

[frankz]

Edit->Edit Preferences->General->Warn when duplicates are added to a playlist

[AkariusOne]

Exactly what I want!  Thanks a lot...in fact, I don't know why I didn't find it.