Nissan Juke 2024 Owners Manual
5.1.4. New keys
As many as four NATS keys can be registered to one vehicle at any one time. New keys must be registered to the NATS components of your vehicle by a NISSAN dealer.
When registering a new key at a NISSAN dealer, you are requested to bring all of your NATS keys with you. This is necessary because the registration process will erase and reprogram the memory of your vehicle's NATS components.
A key number is only required if you have lost all of your keys and do not have one to duplicate from. If you still have a key, this key can be duplicated by a NISSAN dealer.
Owners Manual