Python – An error occurred while modifying an element in the Python list

I’m trying to change an element in a Python list. Follow the tutorial on https://www.programiz.com/python-programming/matrix, I came up with the code below.

 matrix = [[0]*6]*3
 print(matrix)
 matrix[0][0] = 2
 print(matrix)

After running the code, I get the following output:

[[0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0]]
[[2, 0, 0, 0, 0, 0], [2, 0, 0, 0, 0, 0], [2, 0, 0, 0, 0, 0]]

Notice how the last element of each sublist is set to 2 on the last line of the output. How can I change only the first element of the first list.