Key Import
To import a Private Key, enter its transport password, click DECRYPT and then SAVE.
If you already have a private key with the same alias, a warning will be displayed. You cannot have multiple keys with the same alias - the older entry will be overwritten.
You can however change the key alias if you want to retain the other key as well.
You encrypted data does not refer to the key alias, it refers to the fingerprint of the key, which is unique. So feel free to rename keys if needed.