PHP needs random tests.

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Hello, my solution is working only for some test cases. For the rest, the output is "Value is not what was expected", but if I manually verify it the Result Puzzle is a valid one. Any idea what can be the issue here? Using python btw
Example:

Input puzzle part of the Test cases.
[[6, 0, 0, 1, 0, 8, 2, 0, 3],
[0, 2, 0, 0, 4, 0, 0, 9, 0],
[8, 0, 3, 0, 0, 5, 4, 0, 0],
[5, 0, 4, 6, 0, 7, 0, 0, 9],
[0, 3, 0, 0, 0, 0, 0, 5, 0],
[7, 0, 0, 8, 0, 3, 1, 0, 2],
[0, 0, 1, 7, 0, 0, 9, 0, 6],
[0, 8, 0, 0, 3, 0, 0, 2, 0],
[3, 0, 2, 9, 0, 4, 0, 0, 5]]

Result:
Output puzzle
[[6, 4, 5, 1, 9, 8, 2, 7, 3],
[1, 2, 7, 3, 4, 6, 5, 9, 8],
[8, 9, 3, 2, 7, 5, 4, 6, 1],
[5, 1, 4, 6, 2, 7, 3, 8, 9],
[2, 3, 8, 4, 1, 9, 6, 5, 7],
[7, 6, 9, 8, 5, 3, 1, 4, 2],
[4, 5, 1, 7, 8, 2, 9, 3, 6],
[9, 8, 6, 5, 3, 1, 7, 2, 4],
[3, 7, 2, 9, 6, 4, 1, 8, 5]]

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