fail: the anchor is NOT ok and could not be fixed

[Gil Levy]

After a system reboot, I get the following message when I run
#> sudo systemctl status unbound

Oct 23 13:31:38 raspberrypi systemd[1]: Starting Unbound DNS server...
Oct 23 13:31:39 raspberrypi package-helper[513]: /var/lib/unbound/root.key
has content
Oct 23 13:31:39 raspberrypi package-helper[513]: *fail: the anchor is NOT
ok and could not be fixed*
Oct 23 13:31:39 raspberrypi systemd[1]: Started Unbound DNS server.

If I then issue:
#> sudo systemctl restart unbound
#> sudo systemctl status unbound

Oct 23 13:48:30 raspberrypi systemd[1]: Starting Unbound DNS server...
Oct 23 13:48:30 raspberrypi package-helper[1294]: /var/lib/unbound/root.key
has content
Oct 23 13:48:30 raspberrypi package-helper[1294]: *success: the anchor is
ok*
Oct 23 13:48:31 raspberrypi systemd[1]: Started Unbound DNS server.

Why is that?
Running unbound 1.9.0 on Debian.

Thanks.
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