Unknown GnuPG Key after already adding the key

Hello,

I’m trying to add the google cloud SDK repo following the tutorial: https://cloud.google.com/sdk/docs/#rpm

I added both keys through Yast-Software repos. Now when I try to add the repo there:

I still get the warning :

  The file repomd.xml (https://packages.cloud.google.com/yum/repos/cloud-sdk-el7-x86_64)

is digitally signed with the following unknown GnuPG key:
ID: 6A030B21BA07F4FB.

This means that a trust relationship to the creator of the file
cannot be established. Using the file may put the integrity
of your system at risk.

Use it anyway?

I find that the key 6A030B21BA07F4FB is already shown in software repos. So why I wonder why there is this warning.

OK. You need to “OK” out the “software repo” GUI first after adding the key before it gets registered. Then you add the repo it’ll be OK.

I think you are saying:

After adding the key (in Software Repos), you must exit by clicking OK. And then restart Software Repos to add the repo.

I’m just giving a little more detail on what I think you described, so that others are not confused. And if I got that wrong, please correct.