rpm warning

["Artem B. Bityuckiy" <abityuckiy@xxxxxxxxx>]

when I do rpm -qa it writes me warnings like this:

warning: package glibc = 2.3.2-101 was already added, replacing with 
glibc <= 2
.3.2-101

This happens for several RPMs.

Please, say what this means.

Thanks.

--
Best Regards
Artem B. Bityckiy