specs/a/apt/allow-duplicated.conf

Scripts::AptGet::Install::SelectPackage:: "allow-duplicated.lua";
Scripts::AptGet::DistUpgrade:: "allow-duplicated.lua";
Scripts::AptGet::Upgrade:: "allow-duplicated.lua";
Scripts::Synaptic::DistUpgrade:: "allow-duplicated.lua";
Scripts::Synaptic::Upgrade:: "allow-duplicated.lua";

Scripts::AptGet::Install::PreResolve:: "allow-duplicated.lua";