[mrtg] mrtg 2.17.7 vs 2.17.4 with IPv6 Centos

[tslbai]

Hi,

i'm running a server on CentOS 7.6(1810) and installed mrtg 2.17.7

I installed mrtg 2.17.4 from the Centos-Repo. This version of mrtg works without problems (an without errors/warnings).

I also installed the latest version 2.17.7 (./configure; make; make install).
This version seems to work too? but i get some messages which look scary to me:

# env LANG=C /usr/local/mrtg2177/bin/mrtg /tmp/mrtg.cfg
Subroutine SNMP_Session::pack_sockaddr_in6 redefined at /usr/share/perl5/vendor_perl/Exporter.pm line 66.
 at /usr/local/mrtg2177/bin/../lib/mrtg2/SNMP_Session.pm line 149.
Subroutine SNMPv1_Session::pack_sockaddr_in6 redefined at /usr/share/perl5/vendor_perl/Exporter.pm line 66.
 at /usr/local/mrtg2177/bin/../lib/mrtg2/SNMP_Session.pm line 604.
Subroutine main::pack_sockaddr_in6 redefined at /usr/share/perl5/vendor_perl/Exporter.pm line 66.
 at /usr/local/mrtg2177/bin/mrtg line 305.
Subroutine main::unpack_sockaddr_in6 redefined at /usr/share/perl5/vendor_perl/Exporter.pm line 66.
 at /usr/local/mrtg2177/bin/mrtg line 305.
Subroutine main::sockaddr_in6 redefined at /usr/share/perl5/vendor_perl/Exporter.pm line 66.
 at /usr/local/mrtg2177/bin/mrtg line 305.

 
Are these messages a problem or can i ignore them?

Thanks & Bye,
Florian