To make inbuilt select list (cascading) mandatory on both the selections

[Sai Abhiram Chunduru (XFND36)]

Hello ,

There is a custom field built using the selection (cascading) which has two dropdowns (A & B).

A has three options

B has respective selections for A(1) , A(2) & A(3) . This custom field is being used in the request type forms over the customer portal and the field is made mandatory as well.

Unfortunately , sometimes the incident reporters are selecting only the first level dropdown which has options A(1) , A(2) & A(3) and they are able to submit the form without the selection of B dropdown/selection .

Is there a way to make the field mandatory in such a way that , both level 1  & level 2 dropdowns are must before submitting the incident.

Please suggest.

Thank you