missing maintainer是什么错误，搜不到答案。

zswlb9999

root@workhost:~# aptitude install gftp
The following NEW packages will be installed:
  gftp gftp-common{a} gftp-gtk{a} gftp-text{a}
0 packages upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,402kB of archives. After unpacking 4,612kB will be used.
Do you want to continue? [Y/n/?] y
Get:1 http://mirrors.163.com/debian/ squeeze/main gftp-common amd64 2.0.19-2 [966kB]
Get:2 http://mirrors.163.com/debian/ squeeze/main gftp-gtk amd64 2.0.19-2 [241kB]
Get:3 http://mirrors.163.com/debian/ squeeze/main gftp-text amd64 2.0.19-2 [140kB]
Get:4 http://mirrors.163.com/debian/ squeeze/main gftp all 2.0.19-2 [54.9kB]
Fetched 1,402kB in 6s (231kB/s)                                                
Selecting previously deselected package gftp-common.
(Reading database ... 123552 files and directories currently installed.)
Unpacking gftp-common (from .../gftp-common_2.0.19-2_amd64.deb) ...
Selecting previously deselected package gftp-gtk.
Unpacking gftp-gtk (from .../gftp-gtk_2.0.19-2_amd64.deb) ...
Selecting previously deselected package gftp-text.
Unpacking gftp-text (from .../gftp-text_2.0.19-2_amd64.deb) ...
Selecting previously deselected package gftp.
Unpacking gftp (from .../archives/gftp_2.0.19-2_all.deb) ...
Processing triggers for man-db ...
Processing triggers for menu ...
warning, in file '/var/lib/dpkg/updates/0000' near line 5 package 'gftp-common':
missing description
warning, in file '/var/lib/dpkg/updates/0000' near line 5 package 'gftp-common':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0002' near line 6 package 'gftp-common':
missing description
warning, in file '/var/lib/dpkg/updates/0002' near line 6 package 'gftp-common':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0005' near line 5 package 'gftp-gtk':
missing description
warning, in file '/var/lib/dpkg/updates/0005' near line 5 package 'gftp-gtk':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0006' near line 6 package 'gftp-gtk':
missing description
warning, in file '/var/lib/dpkg/updates/0006' near line 6 package 'gftp-gtk':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0008' near line 6 package 'gftp-gtk':
missing description
warning, in file '/var/lib/dpkg/updates/0008' near line 6 package 'gftp-gtk':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0011' near line 5 package 'gftp-text':
missing description
warning, in file '/var/lib/dpkg/updates/0011' near line 5 package 'gftp-text':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0012' near line 6 package 'gftp-text':
missing description
warning, in file '/var/lib/dpkg/updates/0012' near line 6 package 'gftp-text':
missing maintainer
warning, in file '/var/lib/dpkg/updates/0015' near line 5 package 'gftp':
missing description
warning, in file '/var/lib/dpkg/updates/0015' near line 5 package 'gftp':
missing maintainer
Setting up gftp-common (2.0.19-2) ...
Setting up gftp-gtk (2.0.19-2) ...
Setting up gftp-text (2.0.19-2) ...
Setting up gftp (2.0.19-2) ...
Processing triggers for menu ...
localepurge: Disk space freed in /usr/share/locale: 2636 KiB
localepurge: Disk space freed in /usr/share/man: 0 KiB
localepurge: Disk space freed in /usr/share/gnome/help: 0 KiB
localepurge: Disk space freed in /usr/share/omf: 0 KiB

Total disk space freed by localepurge: 2636 KiB