KeyError: 'level' Not Found Despite Verification Using wgrib

[msli72]

I'm using the ai-models-graphcast command to download data from CDS. During execution, I encountered the following error:

Traceback (most recent call last):
File "/home/jhwang/test/ai/bin/ai-models", line 8, in
sys.exit(main())
File "/home/jhwang/test/ai/lib/python3.10/site-packages/ai_models/main.py", line 362, in main
_main(sys.argv[1:])
File "/home/jhwang/test/ai/lib/python3.10/site-packages/ai_models/main.py", line 310, in _main
run(vars(args), unknownargs)
File "/home/jhwang/test/ai/lib/python3.10/site-packages/ai_models/main.py", line 335, in run
model.run()
File "/home/jhwang/test/ai/lib/python3.10/site-packages/ai_models_graphcast/model.py", line 208, in run
) = data_utils.extract_inputs_targets_forcings(
File "/home/jhwang/test/ai/lib/python3.10/site-packages/graphcast/data_utils.py", line 330, in extract_inputs_targets_forcings
dataset = dataset.sel(level=list(pressure_levels))
File "/home/jhwang/test/ai/lib/python3.10/site-packages/xarray/core/dataset.py", line 3223, in sel
query_results = map_index_queries(
File "/home/jhwang/test/ai/lib/python3.10/site-packages/xarray/core/indexing.py", line 194, in map_index_queries
results.append(index.sel(labels, **options))
File "/home/jhwang/test/ai/lib/python3.10/site-packages/xarray/core/indexes.py", line 801, in sel
raise KeyError(f"not all values found in index {coord_name!r}")
KeyError: "not all values found in index 'level'"

It seems that the specified pressure levels are not found in the dataset. However, when I checked the data using wgrib, all the necessary pressure levels appeared to be present.

Could anyone provide guidance on why this discrepancy might be occurring,

Thank you!