Unknown column in MySQL 5.7

Question

I am performing this query:

SELECT C.id, C.content, C.video_id,C.username, C.date_sent, SUM(V.vote) AS vote_total
            FROM comments C 
            LEFT OUTER JOIN comments_votes V 
            ON C.id=V.comment_id 
            WHERE c.video_id = '5'
            GROUP BY C.id, C.content, C.username, C.video_id, C.date_sent, C.video_id
            ORDER BY C.content ASC

And it works fine on my localhost which runs 10.1.21-MariaDB but my host operates on mySQL 5.7 and when I run the above I get:

Error in query (1054): Unknown column 'c.video_id' in 'where clause'

I am not very knowledgable on SQL but I tried to do some research on SO but most solutions point to a bug in 5.5.

My comments table is this:

Answer 1

It looks like one instance is configured as case-insensitive and the other not. Try to change to C.video_id (or better yet, never use uppercase in database identifiers).