Cancel Sub Challenge 2 submission

I accidentally submitted to sc2 (id 8223011). I want to cancel it but there is no button or other option to cancel. What should I do?

Created by Genevieve Patterson Gen
Dear Gen, I cancelled your submission. Best, Thomas

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I accidentally submitted to sc2 (id 8223011). I want to cancel it but there is no button or other option to cancel. What should I do?

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