when i try to tune a existing model named cssupport/t5-small-awesome-text-to-sql based on my new dataset ( this dataset is stored in table ) through pgml.train() i got this issue

postgresml=# SELECT * FROM pgml.train(
project_name => 'odoo_sql_generator',
task => 'text2text-generation',
relation_name => 'public.training_pairs',
y_column_name => 'target_text',
hyperparams => '{
"model": "cssupport/t5-small-awesome-text-to-sql",
"learning_rate": 5e-5,
"batch_size": 8,
"epochs": 3,
"pretrained": true
}'::JSONB
);
ERROR: called Result::unwrap() on an Err value: ()