PostgreSQL 9.4 on Fedora 21

when executing the below command:
yum install
http://yum.postgresql.org/9.4/fedora/fedora-21-x86_64/pgdg-fedora94-9.4-1.noarch.rpm

I get:
error: /etc/pki/rpm-gpg/RPM-GPG-KEY-PGDG-94: key 1 import failed.

I saw an email that said to report any errors and trouble with
installing/packages.

see below for the full output:

================================================================================
Package Arch Version Repository
Size
================================================================================
Installing:
pgdg-fedora94 noarch 9.4-1 /pgdg-fedora94-9.4-1.noarch
2.1 k

Transaction Summary
================================================================================
Install 1 Package

Total size: 2.1 k
Installed size: 2.1 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction (shutdown inhibited)
Installing : pgdg-fedora94-9.4-1.noarch
1/1
error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Resource
temporarily unavailable)
error: /etc/pki/rpm-gpg/RPM-GPG-KEY-PGDG-94: key 1 import failed.
warning: %post(pgdg-fedora94-9.4-1.noarch) scriptlet failed, exit status 1
Non-fatal POSTIN scriptlet failure in rpm package pgdg-fedora94-9.4-1.noarch
Verifying : pgdg-fedora94-9.4-1.noarch
1/1

Installed:
pgdg-fedora94.noarch 0:9.4-1

Then when doing the install - I received a warning the packages aren't
trusted and asked for permission to continue.