I had an assume: some games were imported successfully, but the retor's list_game cannot list it, so I want to figure out which game was imported but unlisted.
When I manually imported those games, I found many games in the ROMs have same name, forexample, "Robotank" occur 3 times, that's why I imported 167 games, but only have 59 in list. because there are same games in the ROMs. I use this ROMS: https://www.atarimania.com/rom_collection_archive_atari_2600_roms.html