Also upload QSOs where QSL_SENT is NULL

application/models/Logbook_model.php

@@ -3107,7 +3107,10 @@ class Logbook_model extends CI_Model {
     $this->db->select('COL_PRIMARY_KEY,COL_CALL, COL_BAND, COL_BAND_RX, COL_TIME_ON, COL_RST_RCVD, COL_RST_SENT, COL_MODE, COL_SUBMODE, COL_FREQ, COL_FREQ_RX, COL_GRIDSQUARE, COL_SAT_NAME, COL_PROP_MODE, COL_LOTW_QSL_SENT, station_id');
 
     $this->db->where("station_id", $station_id);
-    $this->db->where('COL_LOTW_QSL_SENT !=', "Y");
+    $this->db->group_start();
+    $this->db->where('COL_LOTW_QSL_SENT', NULL);
+    $this->db->or_where('COL_LOTW_QSL_SENT !=', "Y");
+    $this->db->group_end();
     $this->db->where('COL_PROP_MODE !=', "INTERNET");
     $this->db->where('COL_TIME_ON >=', $start_date);
     $this->db->where('COL_TIME_ON <=', $end_date);