# Update unique catalog offer promotion

Updates the unique catalog offer promotion.

Endpoint: PUT /v3/project/{project_id}/admin/unique_catalog_offer/{external_id}
Version: 2.0.0
Security: basicAuth

## Path parameters:

  - `project_id` (integer, required)
    Project ID. You can find this parameter in your Publisher Account next to the name of the project.
    Example: 44056

  - `external_id` (integer, required)
    Promotion external ID. Unique promotion identifier within the project.
    Example: "coupon_44056_1"

## Request fields (application/json):

  - `promotion_periods` (array)
    Promotion validity periods. If multiple periods are specified, both date_from and date_until are required.

  - `promotion_periods.date_from` (string, required)
    Start date for the specified promotion.
    Example: "2020-08-11T10:00:00+03:00"

  - `promotion_periods.date_until` (string,null)
    End date for the specified promotion. If set to null, the promotion is indefinite. Can be null only if a single validity period is specified.
    Example: "2020-08-11T20:00:00+03:00"

  - `name` (object, required)
    Name of promotion. Should contain key/value pairs
where key is a locale with "^[a-z]{2}-[A-Z]{2}$" format, value is string.
    Example: {"en-US":"Coupon title","de-DE":"Gutscheintitel"}

  - `items` (array)
    A list of items SKU that are available after using the unique catalog offer.
    Example: ["booster_mega_1"]

  - `redeem_total_limit` (integer,null)
    Limits total numbers of coupons.
    Example: 10

  - `redeem_user_limit` (integer,null)
    Limits total numbers of coupons redeemed by single user.
    Example: 10

  - `redeem_code_limit` (integer,null)
    Number of redemptions per code.
    Example: 10

## Response 401 fields (application/json):

  - `statusCode` (integer)
    Example: 401

  - `errorCode` (integer)
    Example: 1020

  - `errorMessage` (string)
    Example: "[0401-1020]: Error in Authentication method occurred"

## Response 404 fields (application/json):

  - `statusCode` (integer)
    Example: 404

  - `errorCode` (integer)
    Example: 4001

  - `errorMessage` (string)
    Example: "[0401-9802]: Coupon not found"

  - `transactionId` (string)
    Example: "x-x-x-x-transactionId-mock-x-x-x"

## Response 422 fields (application/json):

  - `statusCode` (integer)
    Example: 422

  - `errorCode` (integer)
    Example: 1102

  - `errorMessage` (string)
    Example: "[0401-1102]: Unprocessable Entity. The property `external_id` is required"


## Response 204 fields