If it is a completely different product, and it is like #12 but has sales over 1000 (as an example), it’s usually that they are NOT getting their sales from that keyword, but rather they are getting SOME of their sales from that keyword.
So, you don’t negate it or delete it. Instead, you can just take the data from the products above or below it (or average them) so that it is a more “normalized” number for that position.
For example, if #11 is at 300 sales per month and #13 is at 200 sales per month, you can probably just guesstimate that #12 is getting somewhere in between them. So, just use a number like 250 sales per month as an average for that keyword.