My problem is to leave the first INSERT field empty, (if I fill in the program), in my phpmyadmin the ID field is AUTO_INCREMENT, but without modifying that part of the code, it stopped.
Code:
$sql = "INSERT INTO usuarios VALUES ('','$user','$sobrenome','$sexo','$nascimento','$senha','$email','$foto','$status')";
$busca = mysqli_query($link,$sql);
$afetado = mysqli_affected_rows($link);
There are two ways to do INSERT, the way you are doing, and which columns you want to insert
INSERT INTO TABLE_NAME (column1, column2, column3,...columnN)
VALUES (value1, value2, value3,...valueN);
More infos: link
I can not mount SQL for you because I do not know the columns, but it's easy;)
As long as you are inserting data into a table that has an ID with AUTO_INCREMENT, without specifying the columns it will be populating (which is the case with your example), you should leave the ID value with 'null'.
$sql = "INSERT INTO usuarios VALUES (null,'$user','$sobrenome','$sexo','$nascimento','$senha','$email','$foto','$status')";
Another way is to declare the fields where the data will be inserted into the table. Informing the table fields before VALUES within parentheses.
$sql = "INSERT INTO usuarios (user, senha, email) VALUES ('$user','$senha','$email')";