如果您需要使用“更新现有产品”中的产品CSV文件功能对现有产品进行修改，请登陆wish商户后台，进入“产品”>“更新现有产品”>“产品CSV文件”一栏进行编辑和提交。

如果您需要批量将新的颜色或尺码添加到现有产品，请使用“向现有产品添加尺寸／颜色”功能，请登陆商户后台，进入“产品”>“向现有产品添加尺寸／颜色”>“产品CSV文件”一栏进行编辑和提交。

wish商户官网原文详情：

How to Fix "Parent SKU Exists" Feed Error

You got this error because you tried to add an existing product to your Wish store. To correct this error use the correct feed file.

If you are trying to update an existing products use the "Update Existing Products" CSV file. Please go to Products > Update Existing Products > Product CSV File on your merchant dashboard.

If you are trying to add a new size or color to an existing product, use the "Add Sizes/Colors To Existing Products" CSV file by following Products > Add Sizes/Colors to Existing Products > Product CSV File on your dashboard.

文章内容来源：wish商户官方网站