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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.
How can I remove this Kata from the list of unfinished Kata?
I attempt the solution, it seems okay. Then I back to my unfinished Kata and this is still mark as unfinished.