how to display a validation warming in the attachment using target field

Summary:

I want to display a warning message in the Attachment and Comment sections. The warning should appear in the Attachment section when a user selects No in the DFF field on the Details section, telling them that they need to submit the document.

I’ve already added the validation rule for the DFF field in the Details section, and the warning message does display when No is selected. However, it appears on the same page instead of in the Attachment section. I need it to show specifically in the Attachment section.

I’ve tried using the Target Field and selecting the