Fortunately, I didn’t had to do too much on this lesson, because most of the bones and vertex group had the same name. Only the stem didn’t had the same name, but it was a quick fix.
Another minor issue that I encountered was, after un-parenting the objects, the lamp shade bone didn’t match the position of the lamp shade, so I had to manually adjust it in edit mode.
A bit late, it’s my first post of the year, so I wish you all a Happy New Year! 
