Seemingly harmless 422 error on workflow provenance save

[fivegrant]

ERROR:root:Failed to add provenance for project CONTAINS workflows: status - 422: {'detail': [{'loc': ['body', 'right_type'], 'msg': "value is not a valid enumeration member; permitted: 'Concept', 'Dataset', 'Model', 'ModelConfiguration', 'Project', 'Publication', 'Simulation', 'Artifact', 'Code', 'Document', 'Equation'", 'type': 'type_error.enum', 'ctx': {'enum_values': ['Concept', 'Dataset', 'Model', 'ModelConfiguration', 'Project', 'Publication', 'Simulation', 'Artifact', 'Code', 'Document', 'Equation']}}]}

Appears many times in the docker logs however it doesn't seem to affect anything. Might make things a bit less noisy if we remove it.