clearing question answers between try.s

I have a matching question set up to give the learner two try's before being marked incomplete. I now have the variable (counter) set on an outside page (this moves it to the next page when 2nd incorrect try or back to the question after the first try) so that no variable is set on the question.The question is still saving the answer values from the first try.Is there any way to clear just the values on the one specific question?

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