Error in my code but i turns out my code is correct?

#1

I wrote the follow code and was told there is an error in line 1 no such table as "origin" but when i click get code it gave me the same code. I am confuse

SELECT origin, id,
(SELECT COUNT(*)
FROM flights f
WHERE f.id < flights.id
AND f.origin=flights.origin) + 1
AS flight_sequence_number
FROM flights;

#2

I'm going to say that something slightly different than the code you ran. So similar that you could not notice the difference.

#3

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