Templetes cannot be edit because of items Transactions

Hi!
We Want to change the suppliers details in templetes but because of some Payments Invoices only not Paid & Received of some items so its Unable To change it .Payments Transaction will be cleared after 4 months until. what should Do please Give Solution thanks in Advance

You cannot start tracking inventory of an item that you have set as a non-stock item.

Maybe create a new item and rename!