Integration fix resolution:

Device:
- fixed problem with subscription handling

src/device/service/database/EndPointModel.py

@@ -75,6 +75,5 @@ def set_endpoint_monitors(database : Database, db_endpoint : EndPointModel, grpc
         str_endpoint_kpi_sample_type_key = key_to_str([db_endpoint_pk, str(orm_kpi_sample_type.value)])
         update_or_create_object(database, EndPointMonitorModel, str_endpoint_kpi_sample_type_key, {
             'endpoint_fk'    : db_endpoint,
-            'resource_key'   : '', # during initialization, allow empty value
             'kpi_sample_type': orm_kpi_sample_type,
         })