Hello Alon Grod,

When you click on "Resolve" button the "state" field get set to "Resolved".

You can just create "UI Policy" on incident table with condition "State=resolved" and create UI policy action to make other fields mandatory.

Here in my case I have made description field mandatory if we click on "Resolve"

Output :

When state is not resolved ,Description is not mandatory

When I click on Resolve button description is mandatory.

Hope this will help you..!!