incorrect_cvc
Incorrect CVC. The security code didn't match. On renewals this usually means the card was reissued with a new CVC.
Will retrying the charge work?
No. The same card will keep failing. You need the customer to give you a new payment method.
What to do about it
Ask the customer to re-enter their card details, including the CVC.
What to tell your customer
The card's security code was incorrect. Re-enter your card details to fix it.