diff --git a/webapp/models/Gun.php b/webapp/models/Gun.php
index 72a1bdf4..6bd637c2 100644
--- a/webapp/models/Gun.php
+++ b/webapp/models/Gun.php
@@ -259,7 +259,7 @@ class Gun extends BaseModel {
                 }
             }
         }
-
+        error_log('callstack:' . json_encode(debug_backtrace(), JSON_PRETTY_PRINT));
 
         $dto = array(
             'idx' => $row['idx'],