SCOM 2012 R2 - Error "An Item with the same key has already been added" - UNIX/Linux computers are not showing in the console for me, but they are for other users?

I'm not seeing computers in the UNIX/Linux view in the console, but others are.  This is odd because I have Admin rights for SCOM.

When I do a "find", it does not yield any results.  I have the proper permissions, but is odd that I can't bring up any UNIX/Linux computers in the console.  This happens on any computer I log on to.

This error is also popping up.

Has anyone ever experienced this before? If so what is the fix? Thanks