Have you got our MP tested/implemented beforehand? I presume what happens is that node1 VM was a VIC at some point. Now, VIC and/or nworks Enterprise Manager was removed, but MP is still on node1 agent store.
Please refer to page 18 of http://www.veeam.com/nworks_mp_for_vmwa ... ide_pg.pdf
document for correct removal of Management Pack from your SCOM server.
Please follow up whether it helps or not.