The first one is the confirmation of the subscription contract, it is not an invoice that requires payment. That is why it is set to “paid” immediately.
The second one is the invoice for the first payment of the contract.
There is no way to disable the parent invoice. You do not have to worry about generating two invoices since your customers already expect to receive an extra invoice whenever a renewal payment is processed.
To open a new support ticket, first select the relevant forum and then click the "New Post" button. Example: You need support for the core plugin? Click on Core Plugin support and click on the "New Post" Button.