$ linkml-convert -t ttl -s gbm.yaml -C Subject -S id out.tsv
...
File "/usr/local/anaconda3/envs/linkml/lib/python3.10/site-packages/linkml_runtime/utils/csvutils.py", line 27, in get_configmap
logging.warn(f'Index slot range not to class: {slot.range}')
NameError: name 'logging' is not defined