when the new JsonModel class fields with Literal type the class initialization throws error

when the new JsonModel class fields with Literal type the class initialization throws error: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). class worker(JsonModel): nodeName: str = Field(index=True, description='Name of the worker node')