As seen in OOPS-1194EA331 an AttributeError: 'Distribution' object has no attribute 'distribution' was raised while the apport tracing service was trying to change the target of a distribution bug to a distribution sourcepackage bug.
To reproduce, using the api:
In: bug_357904 = launchpad.bugs[357904]
In: bug_357904.bug_tasks[0].target
Out: <distribution at https://api.staging.launchpad.net/beta/ubuntu>
In: ubuntu = launchpad.distributions['ubuntu']
In: kdepim_source_pkg = ubuntu.getSourcePackage(name='kdepim')
In: bugtask_bug_357904 = bug_357904.bug_tasks[0]
In: bugtask_bug_357904.transitionToTarget(target=kdepim_source_pkg)
HTTPError: HTTP Error 500: Internal Server Error
This oops has been triggered frequently since the 2.2.3 rollout, a few times a day.
