diff --git a/application/models/Logbookadvanced_model.php b/application/models/Logbookadvanced_model.php
index 3678e2b95..477ab9837 100644
--- a/application/models/Logbookadvanced_model.php
+++ b/application/models/Logbookadvanced_model.php
@@ -1191,7 +1191,7 @@ class Logbookadvanced_model extends CI_Model {
 
 			if ($value == '') return;
 
-			$value2 == '' ? null : $value2;
+			if (trim($value2 ?? '') == '') { $value2=null; }
 
 			$sql = "UPDATE ".$this->config->item('table_name')." JOIN station_profile ON ". $this->config->item('table_name').".station_id = station_profile.station_id" .
 			" SET " . $this->config->item('table_name').".COL_FREQ = ?" .