diff --git a/formats/jsonparser.cpp b/formats/jsonparser.cpp
index dc08ff4..559ea20 100644
--- a/formats/jsonparser.cpp
+++ b/formats/jsonparser.cpp
@@ -98,12 +98,16 @@ ModelItemValues JsonParser::jsonObjectToItemValues(const QJsonObject& itemJsonOb
     values.insert(keyValuePair.first, keyValuePair.second);
   }
 
-  QListIterator<UserRoles> i(USER_FACING_ROLES);
-  while (i.hasNext()) {
-    const UserRoles role                  = i.next();
-    std::pair<int, QVariant> keyValuePair = getKeyValuePair(itemJsonObject, role);
-    values.insert(keyValuePair.first, keyValuePair.second);
+  for (auto iter = itemJsonObject.constBegin(), end = itemJsonObject.constEnd(); iter != end;
+       ++iter) {
+    const QString roleName = iter.key();
+    if (ROLE_NAMES.values().contains(roleName)) {
+      const int role                        = ROLE_NAMES.key(roleName.toLatin1());
+      std::pair<int, QVariant> keyValuePair = getKeyValuePair(itemJsonObject, role);
+      values.insert(keyValuePair.first, keyValuePair.second);
+    }
   }
+
   return values;
 }
 
diff --git a/model/tablemodel.cpp b/model/tablemodel.cpp
index 66672b9..860bae0 100644
--- a/model/tablemodel.cpp
+++ b/model/tablemodel.cpp
@@ -302,13 +302,6 @@ QMap<int, QVariant> TableModel::onlyChangedValues(const QModelIndex& index,
     const QVariant oldValue = index.data(role);
     // TODO check if role is a editable role?
     if (oldValue != newValue) {
-      bool emptyValueIsEqualToZero = isEmptyValueEqualToZero(role);
-      // REFACTOR the next if statement is too complex
-      if (emptyValueIsEqualToZero && oldValue == QVariant() && newValue == 0) {
-        qDebug() << "oldValue:" << oldValue << "& newValue:" << newValue
-                 << "mean the same. Ignoring...";
-        continue;
-      }
       qDebug() << "oldValue:" << oldValue << "!= newValue:" << newValue;
       result.insert(role, newValue);
     } else {