postgresql-8.1

[Vincenzo Agosto <netstat@email.it>]

Ciao a tutti,
sto cercando di installare postgresql-8.1 tramite apt-get ma ottengo
questo errore:
Error: cluster configuration already exists
dpkg: error processing postgresql-8.1 (--configure):
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 postgresql-8.1
E: Sub-process /usr/bin/dpkg returned an error code (1)

Poi cerco di rimouverlo con --purge e mi dà :

Removing postgresql-8.1 ...
Stopping PostgreSQL 8.1 database server: main* Error: specified cluster
does not exist
 failed!
invoke-rc.d: initscript postgresql-8.1, action "stop" failed.
dpkg: error processing postgresql-8.1 (--purge):
 subprocess pre-removal script returned error exit status 1
Starting PostgreSQL 8.1 database server: main* Error: specified cluster
does not exist
 failed!
invoke-rc.d: initscript postgresql-8.1, action "start" failed.
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
 postgresql-8.1
E: Sub-process /usr/bin/dpkg returned an error code (1)

come ne esco da questo cul-de-sac ? :)
ciao e grazie
V.