Combining Slides from 2 or more storyline 360 courses

I am trying to use some slides from one storyline course in another one I had created a few years ago.  When I copy the slides and paste them in the course I want to edit, I lost some videos or pictures that are supposed to be there.

There is an outline for the picture but the picture is gone.  The videos show an outline as well but show no video.

Is there an easy way to do this?

Regards

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