Hey @deewuok ,
You might have already seen my answer to the very same question here
When you override config setting you should use double (not triple) dashes (I think there is spelling mistake in the original answer). So could you try:
py -m prodigy train --ner food_data en_vectors_web_lg --paths.init_tok2vec .\tok2vec_cd8_model289.bin --eval-split 0.2 --output tmp_model
Thanks!