分类属性值如果设置有效值范围如何用api去更新属性值为空值

Hi ​@TL_8890625 
 
Thank you for your question.  
 
It appears that your post has not yet received any response. I am replying to raise awareness. Hopefully, another community member will be able to help. 
 
Also, feel free to add any additional information you think might be relevant. It sometimes helps to have screenshots to better understand what you are trying to do. 

Thanks,