Unable to show hidden field (multilevel cascading-add on) on Request Type

[Amit Kumar Singh]

I have created request type with few field to show on customer portal, unable to show one hidden field (multilevel cascading) on request form, when i make it required in filed config, it start showing error to update this field with preset value, but when i click on that field to show from hidden, there is no drop-down options showing to update preset value.