RPC bumpfee with an explicit feerate using `conf_target` and `estimate_mode` errors with `JSONRPCException: JSON integer out of range (-1)`.
{
    return RPCHelpMan{"lockunspent",
                "\nUpdates list of temporarily unspendable outputs.\n"
                "Temporarily lock (unlock=false) or unlock (unlock=true) specified transaction outputs.\n"
                "If no transaction outputs are specified when unlocking then all current locked transaction outputs are unlocked.\n"
                "A locked transaction output will not be chosen by automatic coin selection, when spending bitcoins.\n"
                "Manually selected coins are automatically unlocked.\n"
                "Locks are stored in memory only. Nodes start with zero locked outputs, and the locked output list\n"
                "is always cleared (by virtue of process exit) when a node stops or fails.\n"
                "Also see the listunspent call\n",
                {
                    {"unlock", RPCArg::Type::BOOL, RPCArg::Optional::NO, "Whether to unlock (true) or lock (false) the specified transactions"},