Edition
If you're a one-sided paper anti (someone against one-sided paper), then you should bind all those one-sided papers into an edition.
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The first edition you create is a fan fiction all about the adventures of Han (はん) Solo. You hated how short and one-sided his story in Star Wars seemed to be, and trying to keep track of it all was really hard. But not anymore!
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.