GD object version 2.46 does not match $GD::VERSION 2.56

Объясните пожалуйста как их привести в соответствие?

вот целиком:

/usr/local/bin/mrtg_total.pl /etc/mrtg/mrtg.conf

GD object version 2.46 does not match $GD::VERSION 2.56 at /usr/lib64/perl5/5.20.2/x86_64-linux/DynaLoader.pm line 216.
Compilation failed in require at /usr/local/lib64/perl5/5.20.2/GD/Graph.pm line 38.
BEGIN failed--compilation aborted at /usr/local/lib64/perl5/5.20.2/GD/Graph.pm line 38.
Compilation failed in require at /usr/local/lib64/perl5/5.20.2/GD/Graph/axestype.pm line 18.
BEGIN failed--compilation aborted at /usr/local/lib64/perl5/5.20.2/GD/Graph/axestype.pm line 18.
Compilation failed in require at /usr/local/lib64/perl5/5.20.2/GD/Graph/bars.pm line 18.
BEGIN failed--compilation aborted at /usr/local/lib64/perl5/5.20.2/GD/Graph/bars.pm line 18.
Compilation failed in require at /usr/local/bin/mrtg_total.pl line 154.
BEGIN failed--compilation aborted at /usr/local/bin/mrtg_total.pl line 154.

Проделал:
perl -MCPAN -e shell
cpan> get GD
....
GD-2.56/lib
GD-2.56/lib/GD.xs
GD-2.56/lib/GD.pm
GD-2.56/lib/GD
GD-2.56/lib/GD/Simple.pm
GD-2.56/lib/GD/Polygon.pm
GD-2.56/lib/GD/Group.pm
GD-2.56/lib/GD/Image.pm.PLS
GD-2.56/lib/GD/Polyline.pm
CPAN: File::Temp loaded ok (v0.2304)

cpan> make GD
Running make for module 'GD'
Checksum for /var/tmp/g-cpan/.cpan/sources/authors/id/L/LD/LDS/GD-2.56.tar.gz ok
GD-2.56
......
Manifying blib/man1/bdf2gdfont.pl.1
Manifying blib/man3/GD.3pm
Manifying blib/man3/GD::Image.3pm
Manifying blib/man3/GD::Polygon.3pm
Manifying blib/man3/GD::Polyline.3pm
Manifying blib/man3/GD::Simple.3pm
LDS/GD-2.56.tar.gz
/usr/bin/make -- OK

cpan> install GD
GD is up to date (2.56).

и после этого:
perl-cleaner --reallyall

Эффекта от этого нет.

GD.pm лежит в 2-х каталогах:
/usr/lib64/perl5/vendor_perl/5.20.2/x86_64-linux/GD.pm (тут VERSION = '2.46';)
/usr/local/lib64/perl5/5.20.2/GD.pm (тут VERSION = '2.56';)