libhtml-template-perl prevents installation of mysql-server-5.0

[Calvin Mitchell]

Binary package hint: libhtml-template-perl

lsb_release -rd: Ubuntu karmic (development branch) 9.10
apt-cache policy libhtml-template-perl
libhtml-template-perl:
  Installed: 2.9-1
  Candidate: 2.9-1
  Version table:
 *** 2.9-1 0
        500 http://us.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status
expected to install apache2 & mysql-server-5.0
instead:
sudo apt-get install mysql-server-5.0
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  tinyca
The following NEW packages will be installed:
  mysql-server-5.0
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
Need to get 0B/24.0MB of archives.
After this operation, 81.4MB of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 259425 files and directories currently installed.)
Unpacking mysql-server-5.0 (from .../mysql-server-5.0_5.1.30really5.0.75-0ubuntu10_amd64.deb) ...
Aborting downgrade from (at least) 5.1 to 5.0.
dpkg: error processing /var/cache/apt/archives/mysql-server-5.0_5.1.30really5.0.75-0ubuntu10_amd64.deb (--unpack):
 subprocess pre-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/mysql-server-5.0_5.1.30really5.0.75-0ubuntu10_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Calvin Mitchell (calvin674)]

sudo apt-get -f install
[sudo] password for calvin:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libhtml-template-perl
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

[Calvin Mitchell (calvin674)]

sudo apt-get install mysql-server-5.0
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libhtml-template-perl
Suggested packages:
  libipc-sharedcache-perl tinyca
The following NEW packages will be installed:
  libhtml-template-perl mysql-server-5.0
0 upgraded, 2 newly installed, 0 to remove and 2 not upgraded.
Need to get 0B/24.1MB of archives.
After this operation, 81.6MB of additional disk space will be used.
Do you want to continue [Y/n]?

[Calvin Mitchell (calvin674)]

problem continues with mysql-server-5.0 5.1.30really5.0.83-0ubuntu1 [24.2MB]
Get:2 http://us.archive.ubuntu.com karmic/main libhtml-template-perl 2.9-1 [65.8kB]
Get:3 http://us.archive.ubuntu.com karmic/main mysql-server 5.1.30really5.0.83-0ubuntu1 [57.9kB]
Fetched 24.3MB in 11s (2054kB/s)
Preconfiguring packages ...
(Reading database ... 338087 files and directories currently installed.)
Unpacking mysql-server-5.0 (from .../mysql-server-5.0_5.1.30really5.0.83-0ubuntu1_amd64.deb) ...
Aborting downgrade from (at least) 5.1 to 5.0.
dpkg: error processing /var/cache/apt/archives/mysql-server-5.0_5.1.30really5.0.83-0ubuntu1_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1
Selecting previously deselected package libhtml-template-perl.
Unpacking libhtml-template-perl (from .../libhtml-template-perl_2.9-1_all.deb) ...
Selecting previously deselected package mysql-server.
Unpacking mysql-server (from .../mysql-server_5.1.30really5.0.83-0ubuntu1_all.deb) ...
Processing triggers for man-db ...
Errors were encountered while processing:
 /var/cache/apt/archives/mysql-server-5.0_5.1.30really5.0.83-0ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)