OpenSP force installation

I am trying to force an installation of the OpenSP-1.5 package and getting this message from redhat.  Why am I getting this if this is for a package installation??  Is there a work around for this?
 
[root@seahawk mod]# rpm --force opensp-1.5.1-2.i386.rpm
rpm: only installation, upgrading, rmsource and rmspec may be forced
[root@seahawk mod]#

Received on Monday, 28 June 2004 13:03:44 UTC