How to make Sub Category mandatory

[Alon Grod]

Hi,

I have the fields Category and Sub Category on the incident table. Sub Category values are dependent on Category. For some values on category there are sub categories and some of the values of categories don't have values in sub category. How can I make Sub Category field mandatory only if he has values according to the Category that was chosen ?

[Prince Arora · Accepted solution]

@Alon Grod ,

This solution is tried and tested in the PDI and it is giving correct response.
Please check my attached screenshot from my PDI

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