Removing boinc-manager (7.6.31+dfsg-6ubuntu1) ... Removing boinc-client-nvidia-cuda (7.6.31+dfsg-6ubuntu1) ... Removing boinc-client (7.6.31+dfsg-6ubuntu1) ... Purging configuration files for boinc-client (7.6.31+dfsg-6ubuntu1) ... [?25l[?1c                                                                     Package configuration┌───────────────────────────────────────────────────────────────────────────────────────────────────────┤ Configuring boinc-client ├────────────────────────────────────────────────────────────────────────────────────────────────────────┐│ │ │ The BOINC data directory /var/lib/boinc-client contains the information to which projects the BOINC core client is attached, the work unit cache and several other data. If you no longer need this data, this is your chance to remove │ │ them. │ │ │ │ If no longer have need of the data being stored in the BOINC data directory, you should choose this option. If you want to hold this data for another time, or if you would rather handle this process manually, you should refuse this │ │ option. │ │ │ │ Do you want to remove the BOINC data directory? │ │ │ │  │ │ │ [4 7m└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘  [?25h[?0c [39;49m  Removing user `boinc' ... Warning: group `boinc' has no more members. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: The user `boinc' does not exist. /usr/sbin/deluser: `/usr/local/sbin/deluser.local boinc 121 129 /var/lib/boinc-client' returned error code 2. Exiting. dpkg: error processing package boinc-client (--purge): subprocess installed post-removal script returned error exit status 1