Created attachment 174244 [details]
Some shell log
pgadmin3-1.22.1_2 from TrueOS-major (FreeBSD world ver:..12.0-CURRENT) can not be installed along with any postgresql version different than 9.3 because of dependency.
I believe that pgadmin III it's independent of the postgresql version.
As a new port user, excuse me if this is not the right place way to notify this.
This is a known problem with pkgs -- package dependencies are "baked in" and require a version of a specific package, which causes a problem when (as with postgresql) any of the postgresqlXY-client packages might be used, but those client packages conflict with each other.
The best solution at the moment is to build your own pgadmin3 package with
DEFAULT_VERSIONS+= postgresql=95 in your make.conf. Work is ongoing to make this work better with pkgs, but no indication when those changes will land in the tree.
I think this is pkg's world.
(In reply to rodrigo from comment #2)
Did the suggestion solve this issue for you?