How to set the static field value in the target WorkItem

[VenuVavilala]

I would like to understand how we can set a static field value in the targeted WorkItem,
Scenario : I have a Story work item created in target but while creating the story I want to set the a custom mandatory field called Story Type= Enhancement, this field is not their in the source story WorkItem field.

[MrHinsh]

You can use the Field Literal Map!

https://nkdagility.com/learn/azure-devops-migration-tools/Reference/v1/FieldMaps/FieldLiteralMapConfig/

{
  "$type": "FieldLiteralMapConfig",
  "WorkItemTypeName": "User Story",
  "targetField": "Custom.StoryType",
  "value": "Enhancement"
}