To resolve the active alarms and allow the NSX upgrade to proceed, manually clear the orphaned configurations via the NSX API:
GET https://<REDACTED_IP>/policy/api/v1/infra/ops-global-config_revision integer obtained in step 2:PUT https://<NSX-Manager-IP>/policy/api/v1/infra/ops-global-config{ "resource_type": "OpsGlobalConfig", "id": "ops-global-config", "display_name": "ops-global-config", "operation_collectors": [], "_revision": ####}DELETE https://<NSX-Manager-IP>/policy/api/v1/infra/ipfix-l2-profiles/globalDELETE https://<NSX-Manager-IP>/policy/api/v1/infra/ipfix-l2-collector-profiles/vrni-ipfix-collector-profilePREVENTION:
To avoid this issue, always remove all data sources (vCenter and NSX) from within the VCF Operations for Networks GUI under Settings > Accounts and Data Sources before deleting the appliances or offboarding in Fleet Manager.