fix sessions relationship in seq block model.
fix sessions relationship in seq block model.

dartajax/frontend,stopfstedt/frontend,ilios/frontend,jrjohnson/frontend,djvoa12/frontend,thecoolestguy/frontend,thecoolestguy/frontend,djvoa12/frontend,dartajax/frontend,gabycampagna/frontend,gboushey/frontend,jrjohnson/frontend,ilios/frontend,gabycampagna/frontend,stopfstedt/frontend,gboushey/frontend