sqllite3.DatabaseError: database disk image is malformed

[xiaolingis]

1、Download MBUtil.
2、Unzip the downloaded folder (mbutil-master)
3、Rename the file mb-util to mb-util.py
4、Put your .mbtiles files into the mbutil-master folder
5、Open your command prompt in the mbutil-master folder
6、Execute the following command:
mb-util.py china.mbtile tiles
there is something wrong，sqllite3.DatabaseError: database disk image is malformed