已有标签变成了无效的标签名字没了,导致群发都乱套了,这是什么情况
select a.wx_id,a.contact_user_id,b.label_id,b.name From contacts a join contact_labels b on a.contact_user_id=b.contact_user_id and a.wx_id=b.wx_id where a.wx_id='1688855435359697'
and b.contact_user_id='7881299460124306'