diff --git a/invoice_az/invoice_az/doctype/e_taxes_settings/e_taxes_settings.py b/invoice_az/invoice_az/doctype/e_taxes_settings/e_taxes_settings.py
index c075e8d..f17fda6 100644
--- a/invoice_az/invoice_az/doctype/e_taxes_settings/e_taxes_settings.py
+++ b/invoice_az/invoice_az/doctype/e_taxes_settings/e_taxes_settings.py
@@ -19,7 +19,7 @@ class ETaxesSettings(Document):
 
     def validate_vat_account_mappings(self):
         """
-        Проверка уникальности комбинаций operation_type + classification_code
+        Проверка уникальности комбинаций operation_type + expense_income + classification_code
         в таблице VAT Account Mappings
         """
         if not self.vat_account_mappings:
@@ -30,23 +30,26 @@ class ETaxesSettings(Document):
         for idx, mapping in enumerate(self.vat_account_mappings, start=1):
             # Нормализуем classification_code (None и пустая строка считаются одинаковыми)
             operation_type = mapping.operation_type
+            expense_income = mapping.expense_income
             classification_code = mapping.classification_code or None
 
-            # Создаем ключ для проверки уникальности
-            combination_key = (operation_type, classification_code)
+            # Создаем ключ для проверки уникальности (operation_type + expense_income + classification_code)
+            combination_key = (operation_type, expense_income, classification_code)
 
             if combination_key in seen_combinations:
                 # Формируем понятное сообщение об ошибке
                 if classification_code:
                     frappe.throw(
                         f'Row #{idx}: Duplicate mapping found. '
-                        f'Operation Type "{operation_type}" with Classification Code "{classification_code}" '
+                        f'Operation Type "{operation_type}", Expense/Income "{expense_income}", '
+                        f'Classification Code "{classification_code}" '
                         f'already exists in this settings. Each combination must be unique.'
                     )
                 else:
                     frappe.throw(
                         f'Row #{idx}: Duplicate mapping found. '
-                        f'Operation Type "{operation_type}" with empty Classification Code '
+                        f'Operation Type "{operation_type}", Expense/Income "{expense_income}" '
+                        f'with empty Classification Code '
                         f'already exists in this settings. Each combination must be unique.'
                     )