Problems with saving topology_import_service

[avkoroms]

When I try to save the settings when creating a netbox import, I get the following message:
'/opt/eNMS/eNMS/database.py:474: SAWarning: Usage of the 'Session.add()' operation is not currently supported within the execution stage of the flush process. Results may not be consistent. Consider using alternative event listeners or connection-level operations instead. self.session.add(instance).'
Accordingly, the netbox_token value is not stored in the database. How can this be fixed?