help me solve this puzzel for my kid

it's a 7 x 7 square and you have to use the numbers from 1 to 7 and the same number should not come twice in the same line, diagonaal and column.

1 . . . . . .

. . . . . . 3

. . . . 4 . .

. . 5 . . . .

. . . 2 . . .

. . . . . 7 .

. 6 . . . . .

We think that there is a fault somewhere.... please help solve it

Thank you