Should I be worried for this warn message when installing Elastic?

after a successful instalation, I get this line

warning: elasticsearch-7.8.0-x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID XXXXXX: NOKEY`

I have instaled elastic downloading the file from elastic website, and then moved via SSH to another machine with no internet

Should I be worried for this warn message?

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