GPG signatures found, but none are in trusted keyring

Project Discussion
1

Erro:
$ rpm-ostree update
error: Commit 3034bddf57221592faac74ee78e82cdd17ed4d34a89ac223bd681f50408aa310: GPG signatures found, but none are in trusted keyring

status:
$ rpm-ostree status
State: idle
AutomaticUpdates: disabled
Deployments:
● ostree://fedora-workstation:fedora/rawhide/x86_64/silverblue
Version: Rawhide.20190812.n.0 (2019-08-12T06:17:17Z)
Commit: 6f2902addab8b514213e85592d1b7989be1cfecabe62f4367f8a6c4a375c2203
GPGSignature: Valid signature by 7D22D5867F2A4236474BF7B850CB390B3C3359C4

2

see Unable to update GPG signatures found, but none are in trusted keyring