Is there anyway to update the COGS values of invoices when updating a products cost?

I just noticed that, for all of 2019, one of my best selling products had the purchase cost set INCORRECTLY and it's totally throwing off my year end numbers.  I have since updated the product purchase cost but the COGS have not updated and thus gross profit is still very wrong.

Is my only option to delete all my invoices from 2019 and re-enter?  That would be a nightmare