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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
you should see a link "Edit Kata" in the top right corner of this page (on the left of "add to collection"). From there you can make the needed modifications.
Reference solution is incorrect, as pointed out by @konakona above:
solved ;)
I've just removed the apology, but I'll wait for the original author to change the title to what he/she thinks is best.