error doing a "yum update" not sure what this means exactly

does this mean it did not have a preexisting package that it needed to install?

I am confused

thanks !!!!!!

--> Finished Dependency Resolution
Error: Package: nss-3.19.1-18.el7.x86_64 (rhel-7-server-rpms)
Requires: nss-softokn(x86-64) >= 3.16.2.3-13
Installed: nss-softokn-3.16.2.3-9.el7.x86_64 (@anaconda/7.1)
nss-softokn(x86-64) = 3.16.2.3-9.el7
Available: nss-softokn-3.15.4-2.el7.x86_64 (rhel-7-server-rpms)
nss-softokn(x86-64) = 3.15.4-2.el7
Error: Package: nss-3.19.1-18.el7.x86_64 (rhel-7-server-rpms)
Requires: nss-util >= 3.19.1
Installed: nss-util-3.16.2.3-2.el7.x86_64 (@anaconda/7.1)
nss-util = 3.16.2.3-2.el7
Available: nss-util-3.15.4-2.el7.i686 (rhel-7-server-rpms)
nss-util = 3.15.4-2.el7
Error: Package: nss-3.19.1-18.el7.x86_64 (rhel-7-server-rpms)
Requires: nspr >= 4.10.8
Installed: nspr-4.10.6-3.el7.x86_64 (@anaconda/7.1)
nspr = 4.10.6-3.el7
Available: nspr-4.10.2-4.el7.i686 (rhel-7-server-rpms)
nspr = 4.10.2-4.el7
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest