社区Preview25 系统 不能升级不能安装python，请帮忙指导。

升级提示

Preparing immutable build environment...

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
libncurses-dev : Depends: libtinfo6 (= 6.4-4) but 6.4-4deepin2 is to be installed
Depends: libncurses6 (= 6.4-4) but 6.4-4deepin2 is to be installed
Depends: libncursesw6 (= 6.4-4) but 6.4-4deepin2 is to be installed
libncurses5-dev : Depends: libtinfo6 (= 6.4-4) but 6.4-4deepin2 is to be installed
libncursesw5-dev : Depends: libtinfo6 (= 6.4-4) but 6.4-4deepin2 is to be installed
E: Unable to correct problems, you have held broken packages.
Error: failed to call exec command: failed to build with cumulative mode: failed to execute function: failed to prepare Debian packages: failed to execute command: unmet dependencies