As stated on https://docs.ton.org/develop/howto/fees-low-level :

in_fwd_fees—fees for importing to blockchain incoming message (it is only relevant for messages which were not previously on-chain, that is, external messages. For ordinary messages from contract to contract this fee is not applicable)

So inForwardFee might be wrong in this table because the first row must be a positive value, and the next 2 must be empty.