How can I copy a multiclip to a new library in FCPX 10.2.3 ?

I'm stepping in on another editor's project. He archived a project from Final Cut Pro X 10.0.8, which I copied to a computer with Final Cut Pro X 10.2.3. I updated the project, so it appears as a library, and can relink all files, except the multiclip files. I found a multiclip file (in another library) that I believed he used, but am unable to copy it to the library I'm working in. Is it possible to copy a multiclip from one library to another?