The version number of kdenlive was 18.12.3_4, but it became 18.12.3 after r509000. Therefore, 'pkg version' command reported the package as 'succeeds index' after updating the ports tree on the system, which is unexpected.
A commit references this bug:
Date: Sun Aug 18 19:09:05 UTC 2019
New revision: 509237
Restore PORTREVISION to multimedia/kdenlive
This is basically a duplicate of
r503971 | tcberner | 2019-06-11 19:14:05 +0200 (Tue, 11 Jun 2019) | 8 lines
In r503611 the PORTREVISION was mistakenly dropped (kdenlive is at the
moment held back at a lower version).
Reported by: Ting-Wei Lan
Thanks for reporting (again). This time I've addewd a note to the port Makefile, so hopefully we'll not break it **again** on update. That said, kdenlive is now 18.12 while we have KDE Applications 19.08, so it's more than due for a real update.