Behaviour to clear( set to non) field when another field changes

Oleksii Filiaiev

Hi community,

I have custom field name Probability. it is a single select list. Possible values on the list are filtered depending on issue type and three other fields(aka parent).
When I change value in a parent field I need to erase Probability. 
Because I get situation when Probability High is selected but this is not possible value for selected parent fields.

What  would you suggest?

Thanks,