MYSQL problem: How to add values from one table to another

I have problem with probably a simple matter:
I want to insert data from one table into another.

TO THIS table :

(ID_autor, name, surname)

FROM THIS :

autor(ID_autor, name, surname, nationality, birthday)

This is my code :

INSERT INTO tab1 (ID_autor, name, forname)
SELECT ID_autor, name, forname, nationality, birthday
FROM autor;

But I dont know why it is bad ?????

>Solution :

You should only select the columns that have corresponding columns in the destination table. Since there’s no nationality or birthday columns in tab1, leave those out of the select list.

INSERT INTO tab1 (ID_autor, name, forname)
SELECT ID_autor, name, forname
FROM autor;