SOLVED !Error 1054 -trying to access manage orders

Hi, I'm getting an error when trying to access the manage orders page. It followed after changing the 'from' and 'to' dates to today. I've tried purging cache etc, but it keeps throwing up the same error...

1054 Unknown column 'b.booking_date' in 'where clause' SQL = select count(a.id) FROM qrst_app_sch_orders AS a WHERE 1=1 AND b.booking_date >= '2015-08-21' group by a.id

I've attached a screenshot as the sql code gets flagged up as an injection, so I've edited it somewhat

SOLVED - I LOGGED OUT AND BACK IN AGAIN AND THE PROBLEM WAS GONE