Mnesia write fails

(node1@kitt)4> mnesia:create_table(log_table, [{ram_copies, [node()]},
                                               {attributes, record_info(fields, log)}]).
{atomic,ok}

(node1@kitt)5> mnesia:dirty_write(log_table, #log{id="hebelek"}).
** exception exit: {aborted,{bad_type,#log{id = "hebelek"}}}
in function  mnesia:abort/1

mnesia:create_table(log_table, [{ram_copies, [node()]},
                                {record_name, log},
                                {attributes, record_info(fields, log)}]).