diff --git a/src/app/container/vcontainer.cpp b/src/app/container/vcontainer.cpp
index 535130565..84e867722 100644
--- a/src/app/container/vcontainer.cpp
+++ b/src/app/container/vcontainer.cpp
@@ -480,11 +480,11 @@ const QMap<QString, VLineAngle *> VContainer::DataLineAngles() const
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
- * @brief IncrementTableContains check if increment table contains name
+ * @brief VariableExist check if exist variable this same name.
  * @param name name of row
  * @return true if contains
  */
-bool VContainer::IncrementExist(const QString &name)
+bool VContainer::VariableExist(const QString &name)
 {
     return variables.contains(name);
 }
diff --git a/src/app/container/vcontainer.h b/src/app/container/vcontainer.h
index 4384396a9..a8c94cfc3 100644
--- a/src/app/container/vcontainer.h
+++ b/src/app/container/vcontainer.h
@@ -162,7 +162,7 @@ public:
     qreal              height() const;
     QString            HeightName()const;
 
-    bool               IncrementExist(const QString& name);
+    bool               VariableExist(const QString& name);
 
     void               RemoveIncrement(const QString& name);
 
diff --git a/src/app/dialogs/app/dialogincrements.cpp b/src/app/dialogs/app/dialogincrements.cpp
index acfa9826c..9e8e7aa97 100644
--- a/src/app/dialogs/app/dialogincrements.cpp
+++ b/src/app/dialogs/app/dialogincrements.cpp
@@ -72,7 +72,7 @@ DialogIncrements::DialogIncrements(VContainer *data, VPattern *doc, QWidget *par
 
     //Same regex in pattern.xsd shema file. Don't forget synchronize.
     TextDelegate *textDelegate = new TextDelegate("^([^0-9-*/^+=\\s\\(\\)%:;!.,]){1,1}([^-*/^+=\\s\\(\\)%:;!.,]){0,}$",
-                                                  ui->tableWidgetIncrement);
+                                                  data, ui->tableWidgetIncrement);
     ui->tableWidgetIncrement->setItemDelegateForColumn(0, textDelegate);// name
     DoubleSpinBoxDelegate *doubleDelegate = new DoubleSpinBoxDelegate(ui->tableWidgetIncrement);
     ui->tableWidgetIncrement->setItemDelegateForColumn(2, doubleDelegate);// base value
@@ -536,7 +536,7 @@ void DialogIncrements::clickedToolButtonAdd()
     {
         name = QString(tr("Name_%1")).arg(num);
         num++;
-    } while (data->IncrementExist(name));
+    } while (data->VariableExist(name));
 
     const quint32 id = data->getNextId();
     const QString description(tr("Description"));
diff --git a/src/app/widgets/textdelegate.cpp b/src/app/widgets/textdelegate.cpp
index 47fc974f7..c037fbbfd 100644
--- a/src/app/widgets/textdelegate.cpp
+++ b/src/app/widgets/textdelegate.cpp
@@ -29,15 +29,17 @@
 #include "textdelegate.h"
 #include <QLineEdit>
 #include "../options.h"
+#include "../container/vcontainer.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief TextDelegate constructor.
  * @param parent parent widget.
  */
-TextDelegate::TextDelegate(const QString &regex, QObject *parent): QItemDelegate(parent), lastText(QString("Name_")),
-    regex(regex)
+TextDelegate::TextDelegate(const QString &regex, VContainer *data, QObject *parent)
+    : QItemDelegate(parent), lastText(QString("Name_")), regex(regex), data(data)
 {
+    SCASSERT(data);
     //Little hack. Help save lineedit text in const method.
     connect(this, &TextDelegate::SaveText, this, &TextDelegate::InitText);
 }
@@ -127,7 +129,7 @@ void TextDelegate::commitAndCloseEditor()
     QLineEdit *lineEdit = qobject_cast<QLineEdit*>(sender());
     SCASSERT(lineEdit != nullptr);
     QString text = lineEdit->text();
-    if ( lastText != text && text.isEmpty() == false)
+    if ( lastText != text && text.isEmpty() == false && data->VariableExist(text) == false)
     {
         lastText = text;
         emit commitData(lineEdit);
diff --git a/src/app/widgets/textdelegate.h b/src/app/widgets/textdelegate.h
index 77f0a8462..0b2138b40 100644
--- a/src/app/widgets/textdelegate.h
+++ b/src/app/widgets/textdelegate.h
@@ -31,6 +31,7 @@
 
 #include <QItemDelegate>
 
+class VContainer;
 /**
  * @brief The TextDelegate class a delegate that allows the user to change text values from the model
  * using a edit line widget.
@@ -39,7 +40,7 @@ class TextDelegate : public QItemDelegate
 {
     Q_OBJECT
 public:
-    TextDelegate(const QString &regex, QObject *parent = nullptr);
+    TextDelegate(const QString &regex, VContainer *data, QObject *parent = nullptr);
     QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
     void    setEditorData(QWidget *editor, const QModelIndex &index) const;
     void    setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;
@@ -54,9 +55,13 @@ public slots:
     void    commitAndCloseEditor();
     void    InitText(const QString &text);
 private:
+    Q_DISABLE_COPY(TextDelegate)
+
     /** @brief lastValue last saved value. */
-    QString lastText;
-    QString regex;
+    QString    lastText;
+
+    QString    regex;
+    VContainer *data;
 };
 
 #endif // TEXTDELEGATE_H