I am looking at a set of CONFLICTING RULESET alarms for devices that are no longer part of the GC handling the old ruleset causing the error.
Release : 20.2
Component : Spectrum Core / SpectroSERVER
Please try the following steps (but first take an SSdb backup):
./update action=0x10326 mh=<VNM_ModelHandle>
./update action=0x10327 mh=<VNM_ModelHandle>
./update action=0x10328 mh=<VNM_ModelHandle>
./update action=0x10334 mh=<VNM_ModelHandle>
The action codes should be ideally run against the VNM model.