Broken or wrong unique key columns

[BlackYuzia]

As you can see in the code, I have one unique key with 3 columns

Anyway, I'm getting (in database MariaDB) 2 unique keys (game...type_unique and steam_games_...id_unique) with 1 + 2 columns instead of 1 unique key with all 3 keys .

I don't sure that is expected result