Please remember to configure Knowage correctly: https://knowage.readthedocs.io/en/latest/admin/README/index.html#knowage-notifications-from-external-sources-orion-context-broker
Also, please follow this how-to: https://knowage.readthedocs.io/en/latest/user/NGSI/README/index.html#how-to-use-knowage-with-ngsiv2 paying attention that if you want to exploit the Context Broker publish/subscribe paradigm and enable analyses to be automatically updated, you must provide an URL with only one the following query parameters: