Why are two mobile phone numbers bound to the health code and the ID card belongs to the same person? How to solve it?

You can change the authentication information of another mobile phone number, or cancel the health code in another mobile phone number and replace it with someone else's health code. But even if you have two health codes, it won't affect you, because the health codes are updated in real time, and you can use both numbers. Or you turn off the health code of another mobile phone and always use only one mobile phone for nucleic acid testing.