DAB Unicorns Puzzle

PDOException: SQLSTATE[HY000]: General error: 1021 Disk got full writing '.(temporary)' (Errcode: 28 "No space left on device") in /home/admin/domains/yubnub.games/public_html/classes/Game.php:229 Stack trace: #0 /home/admin/domains/yubnub.games/public_html/classes/Game.php(229): PDOStatement->execute() #1 /home/admin/domains/yubnub.games/public_html/content/themes/theme-functions.php(400): Game::getList() #2 /home/admin/domains/yubnub.games/public_html/content/themes/astro/game.php(195): fetch_games_by_type() #3 /home/admin/domains/yubnub.games/public_html/includes/page-game.php(47): require('...') #4 /home/admin/domains/yubnub.games/public_html/index.php(205): require('...') #5 {main}