Thanks! I saw it now, can't believe I missed that

Just missing where this test case is invalid while debugging my code, been staring at it for a bit so thought I'd just ask:
[[1, 3, 2, 5, 7, 9, 4, 6, 8]
[4, 9, 8, 2, 6, 1, 3, 7, 5]
[7, 5, 6, 3, 8, 4, 2, 1, 9]
[6, 4, 3, 1, 5, 8, 7, 9, 2]
[5, 2, 1, 7, 9, 3, 8, 4, 6]
[9, 8, 7, 4, 2, 6, 5, 3, 1]
[2, 1, 4, 9, 3, 5, 6, 8, 7]
[3, 6, 5, 8, 1, 7, 9, 2, 4]
[8, 7, 9, 6, 4, 2, 1, 3, 5]]