How to duplicate Events, Playlists, Artists, Posts and Custom-Posts
First, you need to install a plugin called "Duplicate Post". - Go to WP-Admin > Appearance > Install Plugins > Add New - Search for "Duplicate Post", install and activate it.
Select Custom Posts you need to duplicate. - Go to WP-Admin > Setting > Duplicate Post - Select the "Permissions" tab - Check all custom posts wanted
A "clone" option is now available below each of your posts.