Column not found: 1054 Unknown column 'messages.deleted_at'

[jiker-burce]

pre operation: send a message to a user;
then visit page: http://phphub5.app/messages
it reports:
ErrorException in Connection.php line 666:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'messages.deleted_at' in 'where clause' (SQL: select * from messages where messages.deleted_at is null and messages.thread_id = 1 and messages.thread_id is not null) (View: \phphub5\resources\views\messages\index.blade.php)