Adding B0FieldSource in func json worked!
Actually, I did not put B0FieldIdentifier in the json files at first. At the beginning, I only add “IntendedFor” field in fmap json files, following BIDS spec 1.6.0. Adding B0FieldIdentifier following BIDS 1.7.0 was my another attempt to solve the problem after the IntendedFor-only attempt failed.
Thanks!