Changing Sales History to Zero

Hi,

I have one item-location combination for which sales history exists in the historical buckets. I am trying to make this history equal = 0 from member management. I logged into member management, filtered out item-location combination and clicked on button INSERT VALUES>> to create 0 sales history in the past.

But when I checked the combination in worksheets sales history didn't changed to 0, it was same as before. Is it not possible to change existing sales history to '0' this way ?

Thanks,