I had created one wiki for group 1 and wanted another two for two other groups. I exported the wiki to a temporary course then imported it back in twice. So now I had three wikis, each one identical. EXCEPT – when I look at a web page I had created in the same course I found it had now a link over the word ‘group’ to a wiki (one that I had copied). This happened everywhere that I had used the word ‘group’. Whether it was in a wiki (it even linked back to itself!) or a web page.
To solve the problem I had to delete all of the copies. I’m in the process of doing each one manually now and just copying the code across, hopefully that’ll work.
If anyone knows what I did wrong or if they've got a better solution I'd love to hear from you!