NW 7.4.2, Win2003

I'm seeing a lot of these, in my log now:

nsrexecd SYSTEM error: There is already a machine using the name: 
"admnlts003.wrk.ads.pha.phila.gov". Either choose a different name for 
your machine, or delete the "NSR peer information" entry for 
"admnlts003.wrk.ads.pha.phila.gov" on host: 
"admnman004.wrk.ads.pha.phila.gov" 

My searches for "delete NSR peer information" seem to indicate to delete 
invalid entries under "Localhosts" in the NMC. However, for *some* (not 
all) the machines being complained about, I see 2 entries - one with just 
hostname, one with the FQDN. And each of these hosts with 2 entries is a 
storage node, I've noticed. AND they all seem to have an entry for my old, 
no longer existing backup server (which I can't delete)

SO ... how to resolve this? Delete one of the duplicate entries? 

And what of the non-duplicate entries?

What causes this, and how to resolve?

Thanks

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