Installing the latest version of zabbix-agent (for exemple?) fails because of RPM signature issues.

Please see below:

[root@vbox-template0 ~]# yum install zabbix-agent
Loaded plugins: fastestmirror
base | 3.6 kB 00:00
epel/x86_64/metalink | 11 kB 00:00
epel | 4.3 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
zabbix | 951 B 00:00
zabbix-non-supported | 951 B 00:00
(1/4): extras/7/x86_64/primary_db | 122 kB 00:01
(2/4): epel/x86_64/updateinfo | 751 kB 00:03
(3/4): updates/7/x86_64/primary_db | 3.8 MB 00:13
(4/4): epel/x86_64/primary_db | 4.6 MB 00:18
(1/2): zabbix-non-supported/x86_64/primary | 1.6 kB 00:00
(2/2): zabbix/x86_64/primary | 12 kB 00:00
Loading mirror speeds from cached hostfile

• base: mirror.trouble-free.net
• epel: mirror.math.princeton.edu
• extras: centos.host-engine.com
• updates: linux.cc.lehigh.edu
  zabbix 79/79
  zabbix-non-supported 4/4
  Resolving Dependencies
  --> Running transaction check
  ---> Package zabbix-agent.x86_64 0:3.2.4-2.el7 will be installed
  --> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
zabbix-agent x86_64 3.2.4-2.el7 zabbix 342 k

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

Total download size: 342 k
Installed size: 1.3 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/zabbix/packages/zabbix-agent-3.2.4-2.el7.x86_64 .rpm: Header V4 DSA/SHA1 Signature, key ID 79ea5ed4: NOKEY
Public key for zabbix-agent-3.2.4-2.el7.x86_64.rpm is not installed
zabbix-agent-3.2.4-2.el7.x86_64.rpm | 342 kB 00:00
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591
Importing GPG key 0xA14FE591:
Userid : "Zabbix LLC <[email protected]>"
Fingerprint: a184 8f53 52d0 22b9 471d 83d0 082a b56b a14f e591
Package : zabbix-release-3.2-1.el7.noarch (installed)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591
Is this ok [y/N]: y

Public key for zabbix-agent-3.2.4-2.el7.x86_64.rpm is not installed

Failing package is: zabbix-agent-3.2.4-2.el7.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-ZABBIX-A14FE591

.but the following works:

[root@vbox-template0 ~]# yum install zabbix-agent-3.2.3-1.el7.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• base: mirror.trouble-free.net
• epel: mirror.math.princeton.edu
• extras: centos.mia.host-engine.com
• updates: linux.cc.lehigh.edu
  Resolving Dependencies
  --> Running transaction check
  ---> Package zabbix-agent.x86_64 0:3.2.3-1.el7 will be installed
  --> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
zabbix-agent x86_64 3.2.3-1.el7 zabbix 338 k

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

Total download size: 338 k
Installed size: 1.1 M
Is this ok [y/d/N]: y
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
zabbix-agent-3.2.3-1.el7.x86_64.rpm | 338 kB 00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : zabbix-agent-3.2.3-1.el7.x86_64 1/1
Verifying : zabbix-agent-3.2.3-1.el7.x86_64 1/1

Installed:
zabbix-agent.x86_64 0:3.2.3-1.el7

Complete!