lib/data/dao/player_game_dao.dart

@@ -46,6 +46,7 @@ class PlayerGameDao extends DatabaseAccessor<AppDatabase>
   }) async {
     await into(playerGameTable).insert(
       PlayerGameTableCompanion.insert(playerId: playerId, gameId: gameId),
+      mode: InsertMode.insertOrReplace,
     );
   }
 }

lib/data/dao/player_group_dao.dart

@@ -56,6 +56,7 @@ class PlayerGroupDao extends DatabaseAccessor<AppDatabase>
 
     await into(playerGroupTable).insert(
       PlayerGroupTableCompanion.insert(playerId: player.id, groupId: groupId),
+      mode: InsertMode.insertOrReplace,
     );
 
     return true;