Hi.
There is a problem with the EnumFieldItem that comes out when using Inspect ().
The EnumFieldItem script only uses the KeyCode.
So I am using the value property and Init method after modifying it.

public override object value
{
　　get
　　{
　　　//return Convert.ChangeType( Enum.Parse( typeof(KeyCode),dropdown.captionText.text), typeof(KeyCode) );
　　　return Convert.ChangeType( Enum.Parse( preValue_.GetType(),dropdown.captionText.text), preValue_.GetType() );
　　}
　　protected set
　　{
　　　　.....
　　}
}

void Init()
{
　　//fieldType = typeof(KeyCode);
　　var currentValue = componentType.GetField(fieldName).GetValue(component);
　　fieldType = currentValue.GetType();
}

I hope to fix this in a later version.
Thank you.