I have added "add_user_meta( $userid, 'last_login',$current_login_time);" instead of "update_user_meta( $userid, 'last_login',$current_login_time);".
Now scenario is I have plenty of MetaKey fields as 'last_login'.
Please advise how can I delete all meta_key i.e. 'last_login' and just keep one the most recent?
Need code or mysql query.
Every help will be very appreciated.