wine users - Sep 2011 - duplicate repository

I'm running Ubuntu 10.04 LTS with Gnome desktop.
Synaptic is giving me the following message: 

W: Duplicate sources.list entry http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/
lucid/main Packages
(/var/lib/apt/lists/ppa.launchpad.net_ubuntu-wine_ppa_ubuntu_dists_lucid_main_binary-i386_Packages)

Which repository should I be using?
Jim

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