[BUG] [SP-API] [Issue] merchant_suggested_asin is on weird behavior

hi guys, I'm really stuck on fileld merchant_suggested_asin, it's a required filed for a product type definitions (TEMPORARY_TATTOO) but I don't know how to fill it to complete my API call.

If I put "merchant_suggested_asin": [ { "value": "WPID||ASIN" } ], It will return as issue on "issues": [ { "code": "8105", "message": "The data you provided for an attribute is invalid. Please refer the data definitions and resubmit with a valid value.", "severity": "ERROR", "attributeNames": [ "merchant_suggested_asin" ], "categories": [ "INVALID_ATTRIBUTE" ] } ],
1. If I put a random number on this, it will return issue as : "code": "8541", "message": "The Listing data provided is different from what's already in the Amazon catalog. The item_id provided matches ASIN 0000000000, but some of the listing data contradicts what is already in the Amazon catalog. The following listing attribute value(s) conflict with Amazon catalog value(s): 'item_name' (Merchant [\"100 PCS Two Fast Race Car Temporary Tattoos Stickers Theme 2nd Birthday Party Decorations Favors Supplies Decor 2 Fast Racing Checkered Tattoo Sticker Gifts For Boys Girls School Prizes Carnival\"] / Amazon [en_US: \"Finding Peaches in the Desert\", en_IN: \"Special Education Teachers Kit: The Cartography of Syntactic Structures, Volume 6\", en_GB: \"Ksiega Diny: The Cartography of Syntactic Structures, Volume 6 (Äldre Svenska Frälsesläkter)\" and 19 other variant(s) en_SG, en_CA, en_AE, en_AU, nl_NL, de_DE, fr_FR, pl_PL, es_ES, hi_IN, zh_CN, ja_JP, es_MX, fr_BE, pt_BR, sv_SE, it_IT, ar_AE, tr_TR]), 'customer_id' (Merchant [\"692323389502\"] / Amazon []). To fix the issue, please follow these steps 1) If the product you are listing is the same as 0000000000, then update your listing's 'item_name, customer_id' attribute(s) to match Amazon's catalog value, 2) If it's not the right ASIN, make sure the item_id provided is correct, or 3) If you disagree with the data in Amazon catalog contact Selling Partner Support to start the appeal process.", "severity": "ERROR",
2. MY question is : how do I put it's as null because I want to listing a new listing that doesn't have exist item on it. as scheme show as
```
` "merchant_suggested_asin": {
"title": "Merchant Suggested ASIN",
"description": "Provide an ASIN for your product if one exists. If a value is not provided, the system will attempt a match based on the External Product ID.",
"examples": [
    "B007KQBXN0"
],
"type": "array",
"minItems": 1,
"minUniqueItems": 1,
"maxUniqueItems": 1,
"selectors": [
    "marketplace_id",
    "value"
],
"items": {
    "type": "object",
    "required": [
        "marketplace_id",
        "value"
    ],
    "properties": {
        "value": {
            "title": "Merchant Suggested ASIN",
            "description": "Provide an ASIN for your product if one exists. If a value is not provided, the system will attempt a match based on the External Product ID.",
            "editable": false,
            "hidden": false,
            "examples": [
                "B007KQBXN0"
            ],
            "type": "string",
            "minLength": 10,
            "maxLength": 10,
            "maxUtf8ByteLength": 40
        },
        "marketplace_id": {
            "$ref": "#/$defs/marketplace_id"
        }
    },
    "additionalProperties": false
}
```
  },`
  
  So it supposes can be empty but looks like it's a bug from SP API Listing.
  
  Please help me on this. Thank you

Hi @qdev89,

When you call Product Type Definitions API, ensure you are using the requirements parameter as LISTING to list an item with both product facts and sales terms or LISTING_PRODUCT_ONLY to list an item with product facts only. Using it as LISTING_OFFER_ONLY will retrieve attributes relevant to do a matching as Merchant Suggested ASIN.

This will return the JSON Schema describing the attributes and constraints for the product type for a new item.

You can look our documentation List an item that does not already exist in the Amazon catalog in order to understand how the flow works.

If the information available in the documentation link provided above does not fully resolve your inquiry, please open a support case with us.

Thanks, Leonardo Nakagawa Solutions Architect, Selling Partner API Developer Support

amzn / selling-partner-api-models

[BUG] [SP-API] [Issue] merchant_suggested_asin is on weird behavior #570