I am a research associate in a univeristy. My status is I140 for NIW has been approved for more than 6 month, I 485 pending for more than 1 yr. Now I want to change my job title from research associate to technician. Will this be considered as a change of the working field, since I heard as a technician, I can't file NIW for green card application? I am really worried about that, Please help!