package redmine 2.4.2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[ertos12]

I tried reinstall for redmine.
And, I got the message as the below :

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libavresample1 libbs2b0 libquvi-scripts libquvi7
  linux-image-generic-lts-vivid ruby-sqlite3 sqlite3 thermald
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 2 not upgraded.
Need to get 0 B/4,541 kB of archives.
After this operation, 0 B of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 416078 files and directories currently installed.)
Preparing to unpack .../redmine_2.4.2-1_all.deb ...
Unpacking redmine (2.4.2-1) over (2.4.2-1) ...
Setting up redmine (2.4.2-1) ...
dbconfig-common: writing config to /etc/dbconfig-common/redmine/instances/default.conf

Creating config file /etc/dbconfig-common/redmine/instances/default.conf with new version

Creating config file /etc/redmine/default/database.yml.new with new version
dbconfig-common: flushing administrative password
Replacing config file /etc/redmine/default/database.yml with new version

Creating config file /etc/redmine/default/session.yml with new version
A new secret session key has been generated in /etc/redmine/default/session.yml
Populating database for redmine instance "default".
This may take a while.
rake aborted!
Access denied for user 'redmine_default'@'localhost' (using password: YES)

Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)
Error when running rake db:migrate, check database configuration.
dpkg: error processing package redmine (--configure):
 subprocess installed post-installation script returned error exit status 1
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: redmine 2.4.2-1
ProcVersionSignature: Ubuntu 3.19.0-26.28~14.04.1-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.12
AptOrdering:
 redmine: Install
 redmine: Configure
Architecture: amd64
Date: Fri Aug 21 08:49:00 2015
DuplicateSignature: package:redmine:2.4.2-1:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-08-17 (3 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: redmine
Title: package redmine 2.4.2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)