Comment 0 for bug 1524316

I got https://oops.canonical.com/?oopsid=OOPS-9e4ded7ce5520af0a9a53412c8e33cae when trying to update the default git repository for the "geonames" project from "~larsu/geonames/+git/geonames-1" to "~geonames-dev/geonames/+git/geonames"

 GitDefaultConflict: The default repository for 'geonames' is already set to ~larsu/geonames/+git/geonames-1. Traceback (most recent call last):
  Module zope.publisher.publish, line 132, in publish
    result = publication.callObject(request, obj)
  Module lp.services.webapp.publication, line 463, in callObject
    return mapply(ob, request.getPositionalArguments(), request)
  Module zope.publisher.publish, line 107, in mapply
    return debug_call(obj, args)
   - __traceback_info__: <security proxied zope.browserpage.metaconfigure.SimpleViewClass from /srv/launchpad.net/production/launchpad-rev-17865/lib/lp/code/browser/../templates/configure-code.pt instance at 0x2b7e6fc6df90>
  Module zope.publisher.publish, line 113, in debug_call
    return obj(*args)
  Module lp.services.webapp.publisher, line 438, in __call__
    self.initialize()
  Module lp.app.browser.launchpadform, line 136, in initialize
    self.form_result = form_action.success(data)
  Module zope.formlib.form, line 620, in success
    return self.success_handler(self.form, self, data)
  Module lp.registry.browser.product, line 1943, in update_action
    self.context, repo)
  Module lp.services.webapp.authorization, line 407, in permission_checker
    return func(self, *args, **kwargs)
  Module lp.code.model.gitrepository, line 1249, in setDefaultRepository
    repository.setTargetDefault(True)
  Module lp.code.model.gitrepository, line 322, in setTargetDefault
    raise GitDefaultConflict(existing, self.target)
GitDefaultConflict: The default repository for 'geonames' is already set to ~larsu/geonames/+git/geonames-1.