That's what I did when I made the same mistake fiddling with the concluding paragraph for one of my quizzes, made it too long without checking (I'll NEVER do THAT again!) before saving the changes, and had it yanked offline so that I had to resubmit. Follow-up to the apologetic message was swift and painless.
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(Editor in Humanities, Religion, Literature and For Children)
That's all, folks!