But at the same time he made his second mistake.

Once before, a student of had made the same mistake.

On the other hand you are making the same mistake.

All of the above is true, but I still shouldn't have made the mistake.

I don't want to make the same mistake all over again, he said to himself.

I try hard not to make the same mistake more than three or four times.

The women do not want to make the same mistake.

But you made the mistake of not first getting the evidence.

You don't make the same mistake on each and every call.

If anything went wrong, then at least others would not make the same mistake.