Adding Serial Number tracking to current item

I am trying to add Serial Number tracking to items that already have transactions in our system. I keep getting the error, “As there are existing transactions for this item, you can not change the value of Has Serial No”. How do I get around this?

The simplest and cleanest way would be to create a new Item, if you are adamant to use the same Item Code then you would have to delete all transactions in the system which is not recommended.