bb - delete column

dear all,

By mistake I added 'smpt' column for one of my clients using bb-hosts.
Now I m trying to delete that column using bb on hobbit server but no luck.

[hobbit at monitor bin]$ ./bb 24.18.160.214 drop 24.18.160.210 smtp
Hobbit version 4.2.0
Usage: ./bb [--debug] [--proxy=http://ip.of.the.proxy:port/] RECIPIENT DATA
  RECIPIENT: IP-address, hostname or URL
  DATA: Message to send, or "-" to read from stdin

thanks
Sabeer MZ