这个错误怎么解决？

[Brand]

前天换了个源，但更新后桌面上该显示字的全成了框框，更新中有一个bao不能安装，错误如下：
(Reading database ... 133802 files and directories currently installed.)
Preparing to replace nautilus-data 2.14.3-0ubuntu1 (using .../nautilus-data_2.17.92-0ubuntu1_all.deb) ...
Unpacking replacement nautilus-data ...
dpkg: error processing /var/cache/apt/archives/nautilus-data_2.17.92-0ubuntu1_all.deb (--unpack):
trying to overwrite `/usr/share/gconf/schemas/apps_nautilus_preferences.schemas', which is also in package nautilus
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
/var/cache/apt/archives/nautilus-data_2.17.92-0ubuntu1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
什么意思？如何解决？