Find the mistake in solving the equation

Consider this solution to a problem.
Problem:  -4(6 - y) + 4 = -4
Step 1:  -24 - 4y + 4 = -4
Step 2:  -20 - 4y = -4
Step 3:  -4y = 16
Step 4:  y = 4

Choose the number of the step where the first mistake was made.
​Then, solve the equation correctly.

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The first mistake was made in Step 1, by not distributing the -4 correctly.
Step 1 should read:  -24 + 4y + 4 = -4

Correct steps and solution:
-4(6 - y) + 4 = -4
-24 + 4y + 4 = -4    {used distributive property with -4}
4y - 20 = -4   {combined like terms}
4y = 16   {added 20 to each side}
y = 4   {divided each side by 4}

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