# `MlPutTrainedModelAliasRequest` [interface-MlPutTrainedModelAliasRequest]

| Name | Type | Description |
| - | - | - |
| `body` | string | ({ [key: string]: any; } & { model_alias?: never; model_id?: never; reassign?: never; }) | All values in `body` will be added to the request body. |
| `model_alias` | [Name](./Name.md) | The alias to create or update. This value cannot end in numbers. |
| `model_id` | [Id](./Id.md) | The identifier for the trained model that the alias refers to. |
| `querystring` | { [key: string]: any; } & { model_alias?: never; model_id?: never; reassign?: never; } | All values in `querystring` will be added to the request querystring. |
| `reassign` | boolean | Specifies whether the alias gets reassigned to the specified trained model if it is already assigned to a different model. If the alias is already assigned and this parameter is false, the API returns an error. |