The probe snmpcollector cannot publish discovery results because an attach or post queue for the subject probe_discovery on the hub /BPAPUIMWMV01_domain/bpapuimwmv03_hub/bpapuimwmv03/hub is not configured.
Release : 20.4
Component : uim -snmpcollector
If snmpcollector is deployed on a secondary hub, please create a queue which can forward the discovery data to upstream hub from the hub where snmpcollector probe is deployed.
https://techdocs.broadcom.com/us/en/ca-enterprise-software/it-operations-management/unified-infrastructure-management/20-4/installing/discover-systems-to-monitor/configuring-discovery/configure-discovery-queues.html