Fix confirmed as working.

    commit 6107c2b15bf19ab5300c2861db365a3dc310adc6 (origin/maint)
    Author: Nicolas Goaziou <mail@nicolasgoaziou.fr>
    Date:   Mon May 10 18:00:58 2021 +0200

         Revert "agenda: Fix "org-duration-to-minutes: Invalid duration
    format" error"

         This reverts commit bc857bfc62ba94e04fb338bfb35f4b612c114d0c.

         The "fix" breaks elsewhere, as reported below.

         Reported-by: Daniel Ortmann <daniel.ortmann@oracle.com>
    <http://lists.gnu.org/r/emacs-orgmode/2021-05/msg00592.html>



On 5/9/21 5:01 PM, Daniel Ortmann wrote:
> Hello,
> I opened my 'plan.org' file today and the C-c a a failed while 
> creating the agenda.  The information is below.
>
> 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
>
> https://urldefense.com/v3/__https://orgmode.org/manual/Feedback.html*Feedback__;Iw!!GqivPVa7Brio!LOkzTB59CDBzIuoTfXvXRwtkVqvxvGdCHi8m2Sx1wNReIvg87vPYcPOk5gcjflocjFo$ 
>
> Your bug report will be posted to the Org mailing list.
> ------------------------------------------------------------------------
>
> The following long-time LOGBOOK entry, which has worked for a long 
> time, now shows an error saying:
>
> - Rescheduled from "[2020-01-16 Thu 12:30-13:30 ++1w]" on [2020-01-16 
> Thu 11:03]
>
> Here is the message from *Messages*:
>
> org-duration-to-minutes: Invalid duration format: #("12:30-13:00 ++1w" 
> 0 16 (fontified nil org-category "plan"))
>
>
> Emacs : GNU Emacs 28.0.50 (build 8, x86_64-pc-linux-gnu, GTK+ Version 
> 3.22.30, cairo version 1.15.12)
> of 2021-05-09
> Package: Org mode version 9.4.5 (release_9.4.5-530-g981f25 @ 
> /home/dortmann/src/git-org-mode/lisp/)
>
>