use sql field names with tables where join happens

src/Repository/MapRepository.php

@@ -22,7 +22,7 @@ class MapRepository
         $select = new Select(\Container::$dbConnection);
         $select->innerJoin('places', ['maps', 'id'], '=', ['places', 'map_id']);
         $select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
-        $select->where('challenge_id', '=', $challenge->getId());
+        $select->where(['place_in_challenge', 'challenge_id'], '=', $challenge->getId());
         $select->limit(1);
 
         return \Container::$persistentDataManager->selectFromDb($select, Map::class);