Hi Gungun,
Although it might seem to be an extremely small mistake, it is always advisable to leave no stones unturned because lot of times what happens is communication is automated and in this case problems might creep in.
Therefore, although chances for problems to creep in for the mistake you have made is very less, why take a chance? Since the correction window is already over, do contact the helpdesk if possible.
Hope this helps.
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