A Database Error Occurred

Error Number: 1055

Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'freegames4rest.games_category.category' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT `game_id`, `category` FROM (`games_category`) WHERE `game_id` IN ('dark_tales_edgar_allan_poes_masque_red_death_se', 'puppet_show_5_destiny_undone_se', 'redemption_cemetery_salvation_of_the_lost_se', 'many_years_ago', 'dark_tales_5_edgar_allan_poes_the_masque_of_the_red_death', 'redemption_cemetery_4_salvation_of_the_lost', 'grim_facade_cost_of_jealousy_se', 'haunted_halls_revenge_of_doctor_blackmore_ce', 'spirits_of_mystery_the_dark_minotaur_se', 'dark_tales_edgar_allan_poes_the_gold_bug_se', 'haunted_legends_the_undertaker', 'haunted_legends_the_undertaker_ce', 'twilight_phenomena_the_lodgers_of_house_13_ce', 'shadow_wolf_mysteries_cursed_wedding_ce', 'gothic_fiction_dark_saga_se', 'redemption_cemetery_grave_testimony_game', 'gothic_fiction_dark_saga', 'grim_facade_sinister_obsession_se', 'grim_facade_sinister_obsession', 'maestro_note_s_of_life', 'dark_alley_s_penumbra_motel') GROUP BY `game_id`