# Models

## The UpdateShipmentLabelCommandRequest object

```json
{"openapi":"3.0.3","info":{"title":"UpdateShipmentLabelOfThePackageCommand API","version":"1.0.0"},"components":{"schemas":{"UpdateShipmentLabelCommandRequest":{"type":"object","description":"Request body for updating shipment label. Either `transition` or `slug` must be provided.\n- If `transition` is provided, `slug` is not required\n- If `slug` is provided, `transition` is not required\n- Providing both is allowed but not necessary\n","required":["input_parameters"],"properties":{"input_parameters":{"type":"object","description":"Command input parameters","required":["package_items"],"properties":{"package_items":{"type":"array","description":"List of package items (can be empty array)","items":{"type":"object"}}}},"transition":{"type":"integer","description":"State transition ID to execute (required if slug is not provided)"},"slug":{"type":"string","description":"State transition slug to execute (required if transition is not provided)"}}}}}}
```

## The ValidationErrorResponse object

```json
{"openapi":"3.0.3","info":{"title":"UpdateShipmentLabelOfThePackageCommand API","version":"1.0.0"},"components":{"schemas":{"ValidationErrorResponse":{"type":"object","description":"Validation error response with field-level errors","required":["error","status_code"],"properties":{"error":{"type":"object","description":"Validation errors grouped by field name","additionalProperties":{"type":"array","items":{"type":"string"}}},"status_code":{"type":"integer","description":"HTTP status code"}}}}}}
```

## The ErrorResponse object

```json
{"openapi":"3.0.3","info":{"title":"UpdateShipmentLabelOfThePackageCommand API","version":"1.0.0"},"components":{"schemas":{"ErrorResponse":{"type":"object","description":"Generic API error response supporting multiple error formats","properties":{"error":{"type":"object","description":"Error payload","oneOf":[{"type":"object","required":["code","message"],"properties":{"code":{"oneOf":[{"type":"string","enum":["INVALID_COMMAND_PARAMETER","INVALID_PACKAGE_STATE_TRANSITION","PACKAGE_STATE_TRANSITION_POST_ACTION_VALIDATION_ERROR","COMMAND_DEFINITION_NOT_ALLOWED"]},{"type":"integer","enum":[4406]}]},"message":{"type":"string"},"details":{"oneOf":[{"type":"object","properties":{"source_state":{"type":"string"},"destination_state":{"type":"string"},"package_state":{"type":"string"}}},{"type":"object","properties":{"error":{"type":"string"}}},{"type":"array","items":{"type":"string"}}]}}},{"type":"object","required":["detail"],"properties":{"detail":{"type":"string"}}}]},"status_code":{"type":"integer","description":"HTTP status code"}},"required":["error"]}}}}
```