CPEData Cannot push into the db

[B1ank]

Hi，when I use the db_updater.py to update cpe data, the python script don't display any error.
But in the update_populate.log, the debug info said "Error during bulk write: batch op errors occurred".

Here are some picture:
Last CPE modified value's time:

Part of debug info:

[PT]

The log says that there is a duplicate key error; please flush the mongodb cpe collection and try again