Do nothing, that tessera is not valid now.
But keep an eye on this thread (there will be more new threads for Round 11), redeem one of the codes you will be able to found there around the time it says and post the screencap of that multimedia in that same thread during the two hours window, write the name of your faction and do not edit your message, that way you'll be eligible for Knight medal.
you have to post this tesserae in the right discussion subject to be valid, example Lucinda unmasked here it is useless
maybe you can have a look at my post about when, how and where to post your screenshot.
so the wrong utc is one of typo?🤔
PAC have said that points will be nullified because of that wrong.