[O] Bug: C-c C-c on deadline timestamp can do nothing useful [9.1.2 (9.1.2-elpaplus @ /Users/aaronjensen/.emacs.d/elpa/26.0/org-plus-contrib-20171004/)]

[Aaron Jensen]

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     http://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org mailing list.
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>From emacs -Q:

M-x org-mode
Insert the following:

* Test
  DEADLINE: <2017-10-06 Sat>

Place point on timestamp and hit C-c C-c

Expected:

Timestamp updated to <2017-10-06 Fri>

Actual:

This is displayed in *Messages*:

user-error: ‘C-c C-c’ can do nothing useful here


Emacs  : GNU Emacs 26.0.60 (build 1, x86_64-apple-darwin17.0.0, NS 
appkit-1561.00 Version 10.13 (Build 17A365))
 of 2017-09-30
Package: Org mode version 9.1.2 (9.1.2-elpaplus @ 
/Users/aaronjensen/.emacs.d/elpa/26.0/org-plus-contrib-20171004/)