lidar pc file path don't exist

[EverNorif]

I have downloaded the mini split and the corresponding sensor data. But when I searched for the lidar pc data according to the meta in the db file, I found that some pcd file paths don't exist.
To be more specific, I could not find 2021.06.03.12.02.06_veh-35_00233_00609/MergedPointCloud/4e582a4085115fc7.pcd

I can find this path in lidar_pc table:

But I can't find it in the related dir, there is nothing match '4e582a4085115fc7.pcd':

I also calculate the num of pcd file in the dir. There are7492 lidar_pc file:

But the lidar_pc table tell that there are 7520 lidar_pc file:

I also unzipped 2021.06.03.12.02.06_veh-35_00233_00609 from nuplan-v1.1_test_lidar_1.zip which also contains this dir, but get the same num 7492.

(I just find some lidar pc files missing in 2021.06.03.12.02.06_veh-35_00233_00609, not sure if there are similar situations elsewhere.)

So I'm confused. Do these pcd files really not exist? Where I can find these lidar pc file？

Thanks!