I am new to Jetson Tx2 Platform. Could anybody help me with this error??

GPG error: file:/var/libopencv4tegra-repo Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 1A2E4274AC7A8482

How do you hit this error? Does Jetpack installation fail?

I think it should be a warning and would not cause following error.