Just because i have to use google to find the solution often here the direct link for fixing nsr peer information error messages.
An example error message can be found below:
39078 19.10.2010 12:07:35 nsrexecd GSS error: There is already a machine using the name: "clientname.domain.com". Either choose a different name for your machine, or delete the "NSR peer information" entry for "clientname.domain.com" on host: "networkerserver.domain.com"
Preston De Guise explained in his blog how to fix the error.