Warning message before policy/setting creation

When I go to create a policy or setting, the system will let me do it, however I receive this warning first:

“Creating policies may result in Domino Directory replication failures on server / client releases that are less than 4.67a. Please make sure your servers and clients are at least release 4.67a or later before continuing. Do you want to continue?”

All my notes clients are on 6.5.4, and the server is running 6.5.4…any ideas why this is coming up and how to stop it?