The PIN submitted in the port in request for this phone number does not match the losing carrier's information.
An invalid or no PIN for this phone number was submitted as part of the port in request.
Update PIN in the port in request to one that matches the losing carrier's information.
PINs are unique to a single phone numbers, so you should not need a new request to change the PIN for just this phone number. Instead update the port in request with the correct PIN.