尝试提交一个空格作为SKU的最后一个字符. 例如如果SKU为"1234"，请提交"1234 ".

Try to submit a space as last character of your SKU. e.g. if SKU is "1234" submit "1234 ".

如果您提交的sku仅包含数字，则有时会出现此问题.

This issue sometimes occurs, if your submitted sku only contains numbers.