Dependent field values in widget

Hello,

 

We are adding attributes using DMC and classification.

The attributes available on create issue window with proper range values (LOVs) but requirement is that if user select a value in 1 field then other fields range values should change.

Ex. Brand and Units are 2 fields/attributes added thru DMC/Classification on Issue type.
Brand field which shows let's say- 100 values and now if I select 1 brand then Units field values will have only 10 values (out of 200).

Thank you!!