Bibliography missing publication date. [FIXED]

[Rich Shepard]

On Tue, 10 Mar 2020, Rich Shepard wrote:

> This may be a glitch in the JabRef 5.x snapshots. I don't recall which of
> the 28597 entries in the bibliographic database I've entered most
> recently, but they might also be lacking the year field. I'll ask on the
> JabRef dev mail list if this could be tested as I have no un-entered
> references now.

To follow up with the found reason: This one technical report's entry in
JabRef 5.1 has an 'optional fields' tab while other technical reports have
both that field and an 'other fields' tab. The Year is in the other fields
tab and not available to that one document. Strange. Mentioned on the JabRef
developer's list on github.

Rich