diff --git a/server/core/DbCreator.js b/server/core/DbCreator.js
index a7d6a26..51cf613 100644
--- a/server/core/DbCreator.js
+++ b/server/core/DbCreator.js
@@ -1,7 +1,7 @@
 const InpxParser = require('./InpxParser');
 const utils = require('./utils');
 
-const emptyFieldValue = '@';
+const emptyFieldValue = '?';
 
 class DbCreator {
     constructor(config) {