Can I change the figures for a single stock sale due to corrected 1099 from Ameritrade, or should I delete the Ameritrade import completely and import the changed 1099?

I received a corrected 1099.  The dollar amounts for one stock sale have been changed, resulting in a change to the summary of proceeds totals.  If I manually change the single stock transaction, will my totals be corrected also, or should I delete the Ameritrade import and do it over?