Default DFF line segment depending order header value

How can I create a SQL for Default order line DFF segment depending on order header value?

I use the SQL below but got error message

select xx.sales_department

  from oe_order_headers_all     oh,

       oe_order_lines_all       ol,

      xx_so_departments sd

where sd.header_id = oh.header_id and

          ol.header_id = oh.header_id and

          ol.line_id = :$FLEX$.line_id

Error message:

APP-FND-00784: Invalid reference line_id in default value defined for segment sales_department