Duplicate Value Validator

The Duplicate Value Validator ensures that no duplicate value is entered into the designated field in the form.

To add this validator, go to the element's properties under Advanced Options > Data and choose Duplicate Value Validator in the Validator field.

When adding a Duplicate Value, you will see the following fields available for configuration:

• Form: Select the target form to validate against.
• Field ID: Field ID in the selected target form to validate against.
  
  Use the same ID as the current element to ensure unique values are entered.
• Duplicate Value Found Error Message: A custom error message to display when a duplicate value is found.
• Mandatory: Check this box if the field must be filled.
• Regular Expression Format Check: Regular Expression to validate the value.
• Wrong RegEx Format Error Message: Custom error message for incorrect Regular Expression format.