how to hide none from single list field

[Swathi]

I need to hide None option from single list can you please help me on this

//import com.onresolve.jira.groovy.user.FormField

//import com.atlassian. jira. component. ComponentAccessor

//import com.atlassianjira.issue.customfields.manager.OptionsManager

//import com.atlassian.jira. component. ComponentAccessor

def statesField = getFieldByName("States")

def countriesField = getFieldByName("Countries")

// Retrieve the selected value from the StatesField dropdown

def selectedValue = statesField.getValue()

// Define the countries to display for each state

def countryValues = [

    "Alaska": ["USA"],

    "Andhra Pradesh": ["India"],

    "Madhya Pradesh": ["India"],

    "Karnataka": ["India"],

    "Tamil Nadu": ["India"],

    "Telangana": ["India"],

    "California": ["USA"],

    "Texas": ["USA"],

    "New South Wales": ["Australia"],

    "Queensland": ["Australia"],

    "South Australia": ["Australia"],

]

// Set the available values of the CountriesField based on the selected value of the StatesField dropdown

countriesField.setFieldOptions(countryValues[selectedValue])

[robert Mugabuhamye]

Hello @Swathi ,
You can try one of these solution s:

1. set the field as mandatory
2. set a default value 

regards

[Nic Brough -Adaptavist-]

If you do both, the "none" will not be offered any more.