Can I use my old encryption keys after I create new ones?

No, you cannot use old encryption keys. Encryption keys are unique and serve to protect your information. When you create new encryption keys, the old keys become invalid.
The use of your old encryption keys may compromise the security of your information. New encryption keys are updated to provide a higher level of security and to keep your data secure.
Therefore if you require new encryption keys, you should only create and use the new keys provided by the system or support. We recommend that you do not use old keys or attempt to restore them, as this may compromise the security of your information.