Requisition goes to "In-Process" status with Update PO_REQUISITION_UPDATE_PUB

I am following the  Note: 1916690.1   to update my requisition lines. I am using following code to update

po_requisition_update_pub.update_requisition(  

                                                      'T',                          --p_init_msg_list

                                                      'Y',                          --p_commit

                                                      l_return_status ,

                                                      l_msg_count,

                                                      l_msg_data,

                                                      'N',        --p_submit_approval

                                                      l_req_hdr,

                                                      l_req_line_tbl,

                                                      l_req_dist_tbl);

Result: My Requisition line is getting updated but the Requisition is going in "IN-PROCESS" Status. I do not want to change requisition status & it should remain in  status as "APPROVED".