Hi ,
After a standard form submission , I trigger an customize action which contains a test.
If the test is true , I want to avoid to add a row.
The notif comfirms that the test is valid but although I use a “Go back” action, the row is added.
How can I do to avoid this ?
You are approaching this the wrong way.
You can’t prevent a row from being added when a form is submitted.
If you want to prevent duplicates, then the correct approach is to use a Custom Form. With that approach you can detect the duplicate before the form is submitted.