/lib/systemd/systemd-journald:6:journal_file_move_to_object:journal_file_find_field_object_with_hash:journal_file_append_field:journal_file_append_data:journal_file_append_entry

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding systemd. This problem was most recently seen with package version 237-3ubuntu10.2, the problem page at https://errors.ubuntu.com/problem/a67e3916866e0dd4fbe8eb557df75c24e466ce91 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.