1. Please check if there is no duplicate itemName value for each option in the product creation JSON text.
2. Check if the attributeTypeName and attributeValueName values are entered in the attribute array so that they are not duplicated.
An example of a duplicate option value error, where the required purchase attribute values are exactly the same.
"items":[
{
"itemName":"sssss"
....
attributes": [
{
"attributeTypeName": "A",
"attributeValueName": "123"
},
{
"attributeTypeName": "B",
"attributeValueName": "456"
}
],
},
{
"itemName":"xxxxx"
....
attributes": [
{
"attributeTypeName": "A",
"attributeValueName": "123"
},
{
"attributeTypeName": "B",
"attributeValueName": "456"
}
],
}
]