Tencent Wangka sent me a short message to change the number, but I can't change it. Why?

Users of Tencent Tianwang Card, Wangdika Card, Dawang Card and Wangxiaoka can change their numbers. Number-related requirements: Are there any services that need to take effect, such as renting a treasure on the same day and taking effect the next month, transferring to a package, and unbound services, such as love card, love number and wangka broadband? If you have a relationship with your love card, you need to cancel your love card before you can change your number.