Change error message generated by webform for duplicate email submission I have a webform which takes a name and an email, the email field is set to not accept duplicates.

I have done this by choosing unique in the field settings (which is next to the required checkbox).

The error message it shows when a duplicate email is attempted is 

'The value email has already been submitted once for the Email field. You may have already submitted this form, or you need to use a different value.'

How can I change this completely?
There's other way if you don't want to code anything.

You can use String Overrides  Module


  This module allow override any translatable string on the site.