In D23682#519903, @mfechner wrote:

In D23682#519868, @mikael wrote:

The redmine project supports the last 2 versions (ie 4.0.x and 4.1.x). I have no objection to use the latest version.

if this is the case, I would upgrade www/redmine to the newest version and would remove the www/redmine4 port completely.
This makes it for the user much more simple which port to use.