Hi, the error you are seeing is because you declared "created_at" with DATE type, and the default value as TIMESTAMP.
I assume you dont really know the difference, but it's quite important.
Date -> YYYY-MM-DD
TimeStamp -> YYYY-MM-DD hh:mm:ss
YYYY = Year
MM = Month
DD = Day
hh = Hour
mm = Minute
ss = Second
As you can see, timestamp includes the date, and the time. In the image, i can see you are trying to asign as default value a timestamp where the data type is DATE, thats why you see that error.