mod_perl / rrdtool conflict

[Brian Hirt]

I was installing mod_perl and I got this conflict:

--->  Activating mod_perl @1.30_0
Error: Target org.macports.activate returned: Image error: /opt/local/ 
lib/perl5/5.8.9/darwin-2level/perllocal.pod is being used by the  
active rrdtool port.  Please deactivate this port first, or use 'port - 
f activate mod_perl' to force the activation.
Error: The following dependencies failed to build: mod_perl
Error: Status 1 encountered during processing.

Any advice besides forcing the install?

Thanks for the help

Brian