1
00:00:01,230 --> 00:00:04,090
Now we still have the error of that.

2
00:00:04,110 --> 00:00:10,480
Each child in illusion should have a unique key pops in the knees.

3
00:00:10,500 --> 00:00:14,760
We have to add a key that is unique.

4
00:00:15,390 --> 00:00:20,640
And so that we at low which card you want to manipulate.

5
00:00:21,030 --> 00:00:29,280
Some people may said why we can't use index actually index may be changed because of the manipulation

6
00:00:29,280 --> 00:00:30,430
of the card.

7
00:00:30,600 --> 00:00:41,100
So there are just some exceptional cases that you think in that is save use when your list is static

8
00:00:41,690 --> 00:00:48,280
while you will not change or this will never be ordered or you haven't do any many police or anything

9
00:00:48,630 --> 00:00:50,000
like filtering.

10
00:00:50,140 --> 00:00:54,450
Otherwise there indefinitely change.

11
00:00:54,480 --> 00:01:01,920
For example if this card used to date had originally these index would be one but since the first one

12
00:01:01,920 --> 00:01:04,690
already stated that it will change to zero.

13
00:01:04,950 --> 00:01:12,090
So it will become changing differently and you may have some unexpected errors.

14
00:01:12,150 --> 00:01:17,520
So we have to add a idea here.

15
00:01:17,610 --> 00:01:21,870
Normally it should be returned from your database.

16
00:01:21,870 --> 00:01:35,650
We may add some random test and just a different.

17
00:01:36,420 --> 00:01:47,340
And then now we can pass these key positive top or IP to the key and save it.

18
00:01:47,340 --> 00:01:48,510
The ERA has gone.