Could not calculate the upgrade

[Ayomide Aro]

I was trying to upgrade my ubuntu from 14.10 to 15.04 and i twas giving me that same error

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubuntu-release-upgrader-core 1:14.10.10
ProcVersionSignature: Ubuntu 3.16.0-43.58-generic 3.16.7-ckt13
Uname: Linux 3.16.0-43-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.5
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Wed Jul 1 00:46:16 2015
InstallationDate: Installed on 2015-01-26 (155 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to utopic on 2015-06-30 (0 days ago)

[Brian Murray (brian-murray)]

You've installed php5 from a PPA and the version of php5 is greater than the version in the release to which you are trying to upgrade. Subsequently, the upgrader can't figure out what to do.

[Brian Murray (brian-murray)]

From Aptlog.txt:

Investigating (0) php5-json [ amd64 ] < 1.3.6-1+deb.sury.org~utopic+1 > ( php )
Broken php5-json:amd64 Depends on phpapi-20121212 [ amd64 ] < none > ( none )
  Considering php5-common:amd64 2 as a solution to php5-json:amd64 1
  Removing php5-json:amd64 rather than change phpapi-20121212:amd64
  MarkDelete php5-json [ amd64 ] < 1.3.6-1+deb.sury.org~utopic+1 > ( php ) FU=0
Investigating (0) fonts-guru-extra [ amd64 ] < none -> 2.0-3 > ( fonts )
Broken fonts-guru-extra:amd64 Breaks on ttf-punjabi-fonts [ amd64 ] < 1:0.5.14ubuntu1 > ( x11 ) (< 2:1.0)
  Considering ttf-punjabi-fonts:amd64 -2 as a solution to fonts-guru-extra:amd64 0
  Added ttf-punjabi-fonts:amd64 to the remove list
  Fixing fonts-guru-extra:amd64 via remove of ttf-punjabi-fonts:amd64
  MarkDelete ttf-punjabi-fonts [ amd64 ] < 1:0.5.14ubuntu1 > ( x11 ) FU=0
Investigating (0) libapache2-mod-php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( httpd )
Broken libapache2-mod-php5:amd64 Depends on php5-json [ amd64 ] < 1.3.6-1+deb.sury.org~utopic+1 > ( php )
  Considering php5-json:amd64 1 as a solution to libapache2-mod-php5:amd64 0
  MarkKeep libapache2-mod-php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( httpd ) FU=0
  Removing libapache2-mod-php5:amd64 rather than change php5-json:amd64
  MarkDelete libapache2-mod-php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( httpd ) FU=0
Investigating (0) php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( php )
Broken php5:amd64 Depends on libapache2-mod-php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( httpd ) (>= 5.6.4+dfsg-4ubuntu6~)
  Considering libapache2-mod-php5:amd64 0 as a solution to php5:amd64 0
  MarkKeep php5 [ amd64 ] < 5.5.26+dfsg-1+deb.sury.org~utopic+1 -> 5.6.4+dfsg-4ubuntu6 > ( php ) FU=0
Broken php5:amd64 Depends on libapache2-mod-php5filter [ amd64 ] < none -> 5.6.4+dfsg-4ubuntu6 > ( universe/httpd ) (>= 5.6.4+dfsg-4ubuntu6~)
  Considering libapache2-mod-php5filter:amd64 -1 as a solution to php5:amd64 0
  Try Installing libapache2-mod-php5filter [ amd64 ] < none -> 5.6.4+dfsg-4ubuntu6 > ( universe/httpd ) before changing php5:amd64
    MarkInstall libapache2-mod-php5filter [ amd64 ] < none -> 5.6.4+dfsg-4ubuntu6 > ( universe/httpd ) FU=0
    Installing php5-json as Depends of libapache2-mod-php5filter
        MarkKeep php5-json [ amd64 ] < 1.3.6-1+deb.sury.org~utopic+1 > ( php ) FU=0