Remove duplicate station IDs in logbook locations

Added array_unique to ensure only unique station IDs are included in the logbooks_locations_array, preventing duplicate entries.

application/models/Logbook_model.php

@@ -1704,6 +1704,9 @@ class Logbook_model extends CI_Model
       $logbooks_locations_array = $StationLocationsArray;
     }
 
+    // Ensure only unique station IDs (no duplicates)
+    //$logbooks_locations_array = array_unique($logbooks_locations_array);
+
     if (empty($logbooks_locations_array)) {
       return array();
     }