package fish-common (not installed) failed to install/upgrade: trying to overwrite '/usr/share/doc-base/fish', which is also in package fish 2.2.0-1~wily

[Nilay Kulkarni]

fish: __fish_pwd
      ^
in command substitution
 called on standard input

in command substitution
 called on standard input

fish: echo $_ " "; __fish_pwd
                   ^
in command substitution
 called on standard input

this is the output whenever I open the terminal

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: fish-common (not installed)
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-generic 3.19.8-ckt12
Uname: Linux 3.19.0-49-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Mon Feb 8 06:42:28 2016
DuplicateSignature: package:fish-common:(not installed):trying to overwrite '/usr/share/doc-base/fish', which is also in package fish 2.2.0-1~wily
ErrorMessage: trying to overwrite '/usr/share/doc-base/fish', which is also in package fish 2.2.0-1~wily
InstallationDate: Installed on 2016-02-07 (0 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu1
SourcePackage: fish
Title: package fish-common (not installed) failed to install/upgrade: trying to overwrite '/usr/share/doc-base/fish', which is also in package fish 2.2.0-1~wily
UpgradeStatus: No upgrade log present (probably fresh install)

[Kai Kasurinen (kai-kasurinen)]

fish 2.2.0-1~wily

Thank you for taking the time to report this bug and trying to help make Ubuntu better. However, it seems that you are not using a software package provided by the official Ubuntu repositories. Because of this the Ubuntu project can not support or fix your particular bug. Please report this bug to the provider of the software package. Thanks!

If you are interested in learning more about software repositories and Ubuntu, check https://help.ubuntu.com/community/Repositories.