[Samba] Unable to fetch value for secret BCKUPKEY_, are we an undetected RODC?

[Mark Foley]

I upgraded from 4.1.23 to 4.2.12 and am now getting (lots of) messages:

Unable to fetch value for secret BCKUPKEY_, are we an undetected RODC?

I found an almost identical message (titled: "Update samba4 from 4.1.17 to 4.2.1 failed") on
the web from May 22, 2015 at:

http://samba.2283325.n4.nabble.com/Update-samba4-from-4-1-17-to-4-2-1-failed-td4686215.html

but saw no resolution other than suggestions by Rowland Penny to remove certain smb.conf
settings, none of which I have.

That page references a bug report https://bugzilla.samba.org/show_bug.cgi?id=11416, with a
response on 2016-04-08 saying the problem is fixed in 4.3 and above.

Seems like this is a problem going from 4.1 to 4.2, but not fixed until 4.3.

Is there anything I can or should do about this?

--Mark