Saturday, November 23, 2019

apt - Upgrade from 14.04 to 15.10 wont work

So here is my problem. I am using Ubuntu 14.04 LTS and I want to upgrade to 15.10. Ubuntu has prompted me with the new version and asked if I want to upgrade to 15.10. I click "Upgrade" and the process starts.
After a few minutes I get the following message below:


An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug using the command
'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

Any help would be greatly appreciated.

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