Resolving a “Multiple triggers with the same action” error [closed]

What's wrong with my trigger? I'm getting this error:

1235 - This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table' whats causing this error what wrong ma i doing?? this my trigger below

When I try to create this trigger:

CREATE TRIGGER emplog_update AFTER UPDATE ON gos 
FOR EACH ROW 
INSERT INTO emp  (id, last_name, first_name,action, time_taken, description)
    select NEW.id,NEW.last_name,NEW.first_name,'U',NOW(),USER(),
           concat_ws(',',
                     (case when new.id <> old.id then 'id' end),
                     (case when new.last_name <> old.last_name then 'last_name' end),
                     (case when new.first_name <> old.first_name then 'first_name' end)
                    );       );

How can I resolve this issue?