RPC and Startup Option
The bip125-replaceable key in the wallet transaction RPCs such
as listtransactions, listsinceblock, and gettransaction is
marked as deprecated. Users still have the option to retrieve this
key by passing the -deprecatedrpc=bip125 startup option. Also,
the -walletrbf startup option has been marked as deprecated and
will be fully removed in the next release. Using this option emits
a warning in the logs.